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Provide tags and a correct Python 3 solution for this coding contest problem.
A necklace can be described as a string of links ('-') and pearls ('o'), with the last link or pearl connected to the first one.
<image>
You can remove a link or a pearl and insert it between two other existing links or pearls (or between a link and a pearl) on the necklace. This process can be repeated as many times as you like, but you can't throw away any parts.
Can you make the number of links between every two adjacent pearls equal? Two pearls are considered to be adjacent if there is no other pearl between them.
Note that the final necklace should remain as one circular part of the same length as the initial necklace.
Input
The only line of input contains a string s (3 β€ |s| β€ 100), representing the necklace, where a dash '-' represents a link and the lowercase English letter 'o' represents a pearl.
Output
Print "YES" if the links and pearls can be rejoined such that the number of links between adjacent pearls is equal. Otherwise print "NO".
You can print each letter in any case (upper or lower).
Examples
Input
<span class="tex-font-style-tt">-o-o--</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---o-</span>
Output
NO
Input
ooo
Output
YES
|
instruction
| 0
| 99,227
| 6
| 198,454
|
Tags: implementation, math
Correct Solution:
```
from collections import Counter
l= Counter(input())
print("NO" if l["o"] and l["-"] % l["o"] else "YES")
```
|
output
| 1
| 99,227
| 6
| 198,455
|
Provide tags and a correct Python 3 solution for this coding contest problem.
A necklace can be described as a string of links ('-') and pearls ('o'), with the last link or pearl connected to the first one.
<image>
You can remove a link or a pearl and insert it between two other existing links or pearls (or between a link and a pearl) on the necklace. This process can be repeated as many times as you like, but you can't throw away any parts.
Can you make the number of links between every two adjacent pearls equal? Two pearls are considered to be adjacent if there is no other pearl between them.
Note that the final necklace should remain as one circular part of the same length as the initial necklace.
Input
The only line of input contains a string s (3 β€ |s| β€ 100), representing the necklace, where a dash '-' represents a link and the lowercase English letter 'o' represents a pearl.
Output
Print "YES" if the links and pearls can be rejoined such that the number of links between adjacent pearls is equal. Otherwise print "NO".
You can print each letter in any case (upper or lower).
Examples
Input
<span class="tex-font-style-tt">-o-o--</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---o-</span>
Output
NO
Input
ooo
Output
YES
|
instruction
| 0
| 99,228
| 6
| 198,456
|
Tags: implementation, math
Correct Solution:
```
import sys,os,io
from sys import stdin
from math import log, gcd, ceil
from collections import defaultdict, deque, Counter
from heapq import heappush, heappop
from bisect import bisect_left , bisect_right
import math
alphabets = list('abcdefghijklmnopqrstuvwxyz')
def isPrime(x):
for i in range(2,x):
if i*i>x:
break
if (x%i==0):
return False
return True
def ncr(n, r, p):
num = den = 1
for i in range(r):
num = (num * (n - i)) % p
den = (den * (i + 1)) % p
return (num * pow(den,
p - 2, p)) % p
def primeFactors(n):
l = []
while n % 2 == 0:
l.append(2)
n = n / 2
for i in range(3,int(math.sqrt(n))+1,2):
while n % i== 0:
l.append(int(i))
n = n / i
if n > 2:
l.append(n)
return list(set(l))
def power(x, y, p) :
res = 1
x = x % p
if (x == 0) :
return 0
while (y > 0) :
if ((y & 1) == 1) :
res = (res * x) % p
y = y >> 1 # y = y/2
x = (x * x) % p
return res
def SieveOfEratosthenes(n):
prime = [True for i in range(n+1)]
p = 2
while (p * p <= n):
if (prime[p] == True):
for i in range(p * p, n+1, p):
prime[i] = False
p += 1
return prime
def countdig(n):
c = 0
while (n > 0):
n //= 10
c += 1
return c
def si():
return input()
def prefix_sum(arr):
r = [0] * (len(arr)+1)
for i, el in enumerate(arr):
r[i+1] = r[i] + el
return r
def divideCeil(n,x):
if (n%x==0):
return n//x
return n//x+1
def ii():
return int(input())
def li():
return list(map(int,input().split()))
def ws(s): sys.stdout.write(s + '\n')
def wi(n): sys.stdout.write(str(n) + '\n')
def wia(a): sys.stdout.write(' '.join([str(x) for x in a]) + '\n')
def power_set(L):
cardinality=len(L)
n=2 ** cardinality
powerset = []
for i in range(n):
a=bin(i)[2:]
subset=[]
for j in range(len(a)):
if a[-j-1]=='1':
subset.append(L[j])
powerset.append(subset)
powerset_orderred=[]
for k in range(cardinality+1):
for w in powerset:
if len(w)==k:
powerset_orderred.append(w)
return powerset_orderred
def fastPlrintNextLines(a):
# 12
# 3
# 1
#like this
#a is list of strings
print('\n'.join(map(str,a)))
def sortByFirstAndSecond(A):
A = sorted(A,key = lambda x:x[0])
A = sorted(A,key = lambda x:x[1])
return list(A)
#__________________________TEMPLATE__________________OVER_______________________________________________________
if(os.path.exists('input.txt')):
sys.stdin = open("input.txt","r") ; sys.stdout = open("output.txt","w")
# else:
# input = io.BytesIO(os.read(0, os.fstat(0).st_size)).readline
def solve():
s = list(si())
if s.count('o')==0 :
print("YES")
return
if (s.count('-')%s.count('o')==0):
print("YES")
return
print("NO")
t = 1
# t = int(input())
for _ in range(t):
solve()
```
|
output
| 1
| 99,228
| 6
| 198,457
|
Provide tags and a correct Python 3 solution for this coding contest problem.
A necklace can be described as a string of links ('-') and pearls ('o'), with the last link or pearl connected to the first one.
<image>
You can remove a link or a pearl and insert it between two other existing links or pearls (or between a link and a pearl) on the necklace. This process can be repeated as many times as you like, but you can't throw away any parts.
Can you make the number of links between every two adjacent pearls equal? Two pearls are considered to be adjacent if there is no other pearl between them.
Note that the final necklace should remain as one circular part of the same length as the initial necklace.
Input
The only line of input contains a string s (3 β€ |s| β€ 100), representing the necklace, where a dash '-' represents a link and the lowercase English letter 'o' represents a pearl.
Output
Print "YES" if the links and pearls can be rejoined such that the number of links between adjacent pearls is equal. Otherwise print "NO".
You can print each letter in any case (upper or lower).
Examples
Input
<span class="tex-font-style-tt">-o-o--</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---</span>
Output
YES
Input
<span class="tex-font-style-tt">-o---o-</span>
Output
NO
Input
ooo
Output
YES
|
instruction
| 0
| 99,229
| 6
| 198,458
|
Tags: implementation, math
Correct Solution:
```
s = input()
p = s.count('o')
n = len(s)
if p == 0 or n % p == 0:
ans = 'YES'
else:
ans = 'NO'
print(ans)
```
|
output
| 1
| 99,229
| 6
| 198,459
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
|
instruction
| 0
| 99,740
| 6
| 199,480
|
Tags: implementation, two pointers
Correct Solution:
```
s=input()
nb=1
n=0
for i in range(len(s)-1):
if (s[i]!=s[i+1]) and (nb%2==0):
n+=1
nb=1
elif (s[i]!=s[i+1]):
nb=1
else:
nb+=1
if nb%2==0:
print(n+1)
else:
print(n)
```
|
output
| 1
| 99,740
| 6
| 199,481
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
|
instruction
| 0
| 99,741
| 6
| 199,482
|
Tags: implementation, two pointers
Correct Solution:
```
dna=input()
ans=0
i=0
while i<len(dna):
j=i+1
while j<len(dna) and dna[j]==dna[j-1]:
j+=1
if not (j-i)&1:
ans+=1
i=j
print(ans)
```
|
output
| 1
| 99,741
| 6
| 199,483
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
|
instruction
| 0
| 99,742
| 6
| 199,484
|
Tags: implementation, two pointers
Correct Solution:
```
y=input()
final=0
i=0
while i<len(y):
if y[i]=='A':
flag=0
while i<len(y):
if y[i]=='A':
flag+=1
else:
break
i+=1
if flag%2==0:
final=final+1
elif y[i]=='T':
flag=0
while i<len(y):
if y[i]=='T':
flag+=1
else:
break
i=i+1
if flag%2==0:
final=final+1
elif y[i]=='G':
flag=0
while i<len(y):
if y[i]=='G':
flag+=1
else:
break
i+=1
if flag%2==0:
final=final+1
elif y[i]=='C':
flag=0
while i<len(y):
if y[i]=='C':
flag+=1
else:
break
i+=1
if flag%2==0:
final=final+1
print(final)
```
|
output
| 1
| 99,742
| 6
| 199,485
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
|
instruction
| 0
| 99,743
| 6
| 199,486
|
Tags: implementation, two pointers
Correct Solution:
```
string = input()
s = string[0]
n = 0
values = []
for i in string:
if i == s:
n += 1
else:
values.append(n)
n = 1
s = i
values.append(n)
t = 0
for i in values:
if i % 2 == 0:
t += 1
print(t)
```
|
output
| 1
| 99,743
| 6
| 199,487
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
|
instruction
| 0
| 99,744
| 6
| 199,488
|
Tags: implementation, two pointers
Correct Solution:
```
r = input()
i = 0
outer_count = 0
while i < len(r):
count = 0
char = r[i]
while r[i] == char:
count += 1
i += 1
if i == len(r):
break
if count % 2 == 0:
outer_count += 1
print(outer_count)
```
|
output
| 1
| 99,744
| 6
| 199,489
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
|
instruction
| 0
| 99,745
| 6
| 199,490
|
Tags: implementation, two pointers
Correct Solution:
```
s = input()
piece = ''
count = 0
for i in range(len(s)-1):
if s[i+1] != s[i] :
piece += s[i]
#print(piece)
if len(piece) % 2 == 0 :
count += 1
piece = ''
else:
piece += s[i]
if i == len(s)-2 and s[len(s)-2] == s[len(s)-1]:
piece += s[-1]
if len(piece) % 2 == 0 :
count += 1
print(count)
```
|
output
| 1
| 99,745
| 6
| 199,491
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
|
instruction
| 0
| 99,746
| 6
| 199,492
|
Tags: implementation, two pointers
Correct Solution:
```
import sys
string = str(sys.stdin.readline())
string = list(string)
def solution(string):
count = 1
answer = 0
num = 0
#string.remove("\n")
for i in string:
if i == "\n":
return print(answer)
elif i == string[num+1]:
count+=1
elif i != string[num+1]:
if count % 2 == 0 and count != 0:
answer += 1
count = 1
num+=1
return print(answer)
solution(string)
```
|
output
| 1
| 99,746
| 6
| 199,493
|
Provide tags and a correct Python 3 solution for this coding contest problem.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
|
instruction
| 0
| 99,747
| 6
| 199,494
|
Tags: implementation, two pointers
Correct Solution:
```
import re
x = input()
l = [0 for i in range(len(x))]
c, h = 1, 0
for i in range(len(x) - 1):
l, r = x[i], x[i + 1]
if l is r:
c += 1
else:
if c % 2 is 0:
h += 1
c = 1
if c % 2 is 0:
h += 1
print(h)
# g = re.findall(r'G+', x)
# t = re.findall(r'T+', x)
# a = re.findall(r'A+', x)
# c = re.findall(r'C+', x)
# print(g, a, t, c)
```
|
output
| 1
| 99,747
| 6
| 199,495
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
Submitted Solution:
```
a=input()
a=" ".join(a)
a=a.split()
suma=0
contador=0
for k in range (len(a)):
if a[k]!="*":
igual=a[k]
contador=0
for r in range (k+1,len(a)):
if a[k]==a[r]:
contador=contador+1
a[r]="*"
else:
break
if contador%2!=0:
suma=suma+1
print(suma)
```
|
instruction
| 0
| 99,748
| 6
| 199,496
|
Yes
|
output
| 1
| 99,748
| 6
| 199,497
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
Submitted Solution:
```
s=input()
cnts = []
cnt=1
for i in range(1,len(s)):
if s[i] == s[i-1]:
cnt+=1
else:
cnts.append(cnt)
cnt = 1
cnts.append(cnt)
print(sum([1*int(cnts[i]%2==0) for i in range(len(cnts))]))
```
|
instruction
| 0
| 99,749
| 6
| 199,498
|
Yes
|
output
| 1
| 99,749
| 6
| 199,499
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
Submitted Solution:
```
n = input()
x = 1
cnt = 0
for i in range(len(n)-1):
if(n[i] == n[i+1]):
x+=1
else:
if(x % 2 == 0):
cnt += 1
x = 1
if(x % 2==0):
print(cnt+1)
else:
print(cnt)
```
|
instruction
| 0
| 99,750
| 6
| 199,500
|
Yes
|
output
| 1
| 99,750
| 6
| 199,501
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
Submitted Solution:
```
import itertools
if __name__ == "__main__":
s = input()
z = [(x[0], len(list(x[1]))) for x in itertools.groupby(s)]
count = 0
for i in z:
if i[1] %2 ==0:
count +=1
print(count)
```
|
instruction
| 0
| 99,751
| 6
| 199,502
|
Yes
|
output
| 1
| 99,751
| 6
| 199,503
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
Submitted Solution:
```
arr = input()
count = 0
insertion = 0
for i in range(1,len(arr)):
if arr[i] == arr[i-1]:
count += 1
else:
if (count+1) % 2 == 0:
insertion += 1
count = 0
print(insertion)
```
|
instruction
| 0
| 99,752
| 6
| 199,504
|
No
|
output
| 1
| 99,752
| 6
| 199,505
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
Submitted Solution:
```
s=input()
cnts = []
cnt=1
for i in range(1,len(s)):
if s[i] == s[i-1]:
cnt+=1
else:
cnts.append(cnt)
cnt = 1
print(sum([1*int(cnts[i]%2==0) for i in range(len(cnts))]))
```
|
instruction
| 0
| 99,754
| 6
| 199,508
|
No
|
output
| 1
| 99,754
| 6
| 199,509
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
Manao has determined that if the stretch of DNA contains a maximal sequence of consecutive identical nucleotides that is of even length, then the protein will be nonfunctional. For example, consider a protein described by DNA string "GTTAAAG". It contains four maximal sequences of consecutive identical nucleotides: "G", "TT", "AAA", and "G". The protein is nonfunctional because sequence "TT" has even length.
Manao is trying to obtain a functional protein from the protein he currently has. Manao can insert additional nucleotides into the DNA stretch. Each additional nucleotide is a character from the set {'A', 'T', 'G', 'C'}. Manao wants to determine the minimum number of insertions necessary to make the DNA encode a functional protein.
Input
The input consists of a single line, containing a string s of length n (1 β€ n β€ 100). Each character of s will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission.
Output
The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length.
Examples
Input
GTTAAAG
Output
1
Input
AACCAACCAAAAC
Output
5
Note
In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein.
Submitted Solution:
```
import re
x = input()
l = [0 for i in range(len(x))]
c, h = 1, 0
for i in range(len(x) - 1):
l, r = x[i], x[i + 1]
if l is r:
c += 1
else:
if c % 2 is 0:
h += 1
c = 1
print(h)
```
|
instruction
| 0
| 99,755
| 6
| 199,510
|
No
|
output
| 1
| 99,755
| 6
| 199,511
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
|
instruction
| 0
| 99,761
| 6
| 199,522
|
Tags: implementation, strings
Correct Solution:
```
heading = input()
text = input()
hcounts = {}
for char in heading:
if char != ' ':
if char in hcounts:
hcounts[char] += 1
else:
hcounts[char] = 1
impos = False
for char in text:
if char != ' ':
if char in hcounts:
hcounts[char] -= 1
if hcounts[char] < 0:
impos = True
break
else:
impos = True
if impos:
print('NO')
else:
print('YES')
```
|
output
| 1
| 99,761
| 6
| 199,523
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
|
instruction
| 0
| 99,762
| 6
| 199,524
|
Tags: implementation, strings
Correct Solution:
```
def chrnum(s,a):
ans=0
for i in s:
if i==a:ans+=1
return ans
s1=input()
s2=input()
s1=s1.replace(' ','')
s2=s2.replace(' ','')
def fn(s1,s2):
for i in s2:
if chrnum(s2,i)>chrnum(s1,i):return 'NO'
return 'YES'
print(fn(s1,s2))
```
|
output
| 1
| 99,762
| 6
| 199,525
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
|
instruction
| 0
| 99,763
| 6
| 199,526
|
Tags: implementation, strings
Correct Solution:
```
heading = input()
text = input()
for letter in text:
if letter != ' ':
if letter in heading:
heading = heading.replace(letter, '', 1)
else:
print("NO")
exit()
print("YES")
```
|
output
| 1
| 99,763
| 6
| 199,527
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
|
instruction
| 0
| 99,764
| 6
| 199,528
|
Tags: implementation, strings
Correct Solution:
```
s1 = list(input().replace(' ', ''))
s2 = list(input().replace(' ', ''))
s3 = []
for i in s2:
if i in s1:
s1.remove(i)
s3.append(i)
if len(s3) == len(s2):
print('YES')
else:
print('NO')
```
|
output
| 1
| 99,764
| 6
| 199,529
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
|
instruction
| 0
| 99,765
| 6
| 199,530
|
Tags: implementation, strings
Correct Solution:
```
s1=input()
s2=input()
b=list(set(s2))
if ' ' in b:
b.remove(' ')
c=0
for i in b:
if s2.count(i)<=s1.count(i):
c+=1
if c==len(b):
print('YES')
else:
print('NO')
```
|
output
| 1
| 99,765
| 6
| 199,531
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
|
instruction
| 0
| 99,766
| 6
| 199,532
|
Tags: implementation, strings
Correct Solution:
```
# Long Contest 1, Problem J
head = input()
text = input()
hm = {}
for ch in head:
if ch == ' ':
continue
hm[ch] = hm.get(ch, 0)+1
tm = {}
for ch in text:
if ch == ' ':
continue
tm[ch] = tm.get(ch, 0)+1
flag = True
for ch, tcount in tm.items():
hcount = hm.get(ch, 0)
if hcount == 0 or hcount < tcount:
flag = False
break
if flag:
print('YES')
else:
print('NO')
```
|
output
| 1
| 99,766
| 6
| 199,533
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
|
instruction
| 0
| 99,767
| 6
| 199,534
|
Tags: implementation, strings
Correct Solution:
```
s = input()
text = input()
headers = {}
for char in s:
try: headers[char] += 1
except: headers[char] = 0
for char in text:
if char == ' ': continue
if char in headers:
if headers[char] >= 0:
headers[char] -= 1
else:
print('NO')
exit()
else:
print('NO')
exit()
print('YES')
```
|
output
| 1
| 99,767
| 6
| 199,535
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
|
instruction
| 0
| 99,768
| 6
| 199,536
|
Tags: implementation, strings
Correct Solution:
```
def removeSpace(x):
res = ""
for _ in range(len(x)):
if x[_] != " ":
res += x[_]
return res
string1 = sorted(removeSpace(input()))
string2 = sorted(removeSpace(input()))
temp = 0
count = len(string2)
for i in range(count):
if string2[i] in string1:
string1.remove(string2[i])
temp += 1
if temp == count:
print("YES")
else:
print("NO")
```
|
output
| 1
| 99,768
| 6
| 199,537
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
Submitted Solution:
```
from collections import Counter
def main():
heading = input()
text = input()
hcnt = Counter(heading)
htxt = Counter(text)
del hcnt[' ']
del htxt[' ']
for k, v in htxt.items():
if hcnt[k] < v:
print('NO')
return
print('YES')
if __name__ == "__main__":
main()
```
|
instruction
| 0
| 99,772
| 6
| 199,544
|
Yes
|
output
| 1
| 99,772
| 6
| 199,545
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
Submitted Solution:
```
n = input()
heading = []
for ele in n :
heading.append(ele)
x = input()
text = []
for ele in x:
text.append(ele)
head = []
for ele in heading:
if ele.strip():
head.append(ele)
tex = []
for ele in text:
if ele.strip():
tex.append(ele)
#print("heading:",head)
#print("text:",tex)
for ele in tex:
if ele not in head:
print("NO")
exit()
tex.remove(ele)
head.remove(ele)
print("YES")
```
|
instruction
| 0
| 99,773
| 6
| 199,546
|
No
|
output
| 1
| 99,773
| 6
| 199,547
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
Submitted Solution:
```
import math as M
import heapq as H
import itertools as I
import collections as C
from itertools import groupby as gb
from math import log10 ,log2,ceil,factorial as f
from itertools import combinations_with_replacement as com
arr = lambda x :map(x,input().split())
var = lambda x:x(input())
s1 = var(str)
s2 = var(str)
s1 = C.Counter(s1)
s2 = C.Counter(s2)
f=0
try:
for i in s2:
if s2[i]>s1[i]:
f=1
except:
f=1
if f==1:print("NO")
else:print("YES")
```
|
instruction
| 0
| 99,774
| 6
| 199,548
|
No
|
output
| 1
| 99,774
| 6
| 199,549
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
Submitted Solution:
```
import collections as c
a=input().replace(' ','')
b=input().replace(' ','')
#print(a,b)
aa=c.Counter(a)
bb=c.Counter(b)
print("YES") if aa-bb else print("NO")
```
|
instruction
| 0
| 99,775
| 6
| 199,550
|
No
|
output
| 1
| 99,775
| 6
| 199,551
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vasya decided to write an anonymous letter cutting the letters out of a newspaper heading. He knows heading s1 and text s2 that he wants to send. Vasya can use every single heading letter no more than once. Vasya doesn't have to cut the spaces out of the heading β he just leaves some blank space to mark them. Help him; find out if he will manage to compose the needed text.
Input
The first line contains a newspaper heading s1. The second line contains the letter text s2. s1 ΠΈ s2 are non-empty lines consisting of spaces, uppercase and lowercase Latin letters, whose lengths do not exceed 200 symbols. The uppercase and lowercase letters should be differentiated. Vasya does not cut spaces out of the heading.
Output
If Vasya can write the given anonymous letter, print YES, otherwise print NO
Examples
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
where is your dog
Output
NO
Input
Instead of dogging Your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
YES
Input
Instead of dogging your footsteps it disappears but you dont notice anything
Your dog is upstears
Output
NO
Input
abcdefg hijk
k j i h g f e d c b a
Output
YES
Submitted Solution:
```
s1 = input()
s2 = input()
flag = True
for i in range(len(s2)):
if not s1.__contains__(s2[i]):
flag = False
break
else:
if s1.__contains__(s2[i]):
s1.replace(s2[i], '')
s2.replace(s2[i], '')
else:
flag = False
break
if flag:
print('YES')
else:
print('NO')
```
|
instruction
| 0
| 99,776
| 6
| 199,552
|
No
|
output
| 1
| 99,776
| 6
| 199,553
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Analyzing the mistakes people make while typing search queries is a complex and an interesting work. As there is no guaranteed way to determine what the user originally meant by typing some query, we have to use different sorts of heuristics.
Polycarp needed to write a code that could, given two words, check whether they could have been obtained from the same word as a result of typos. Polycarpus suggested that the most common typo is skipping exactly one letter as you type a word.
Implement a program that can, given two distinct words S and T of the same length n determine how many words W of length n + 1 are there with such property that you can transform W into both S, and T by deleting exactly one character. Words S and T consist of lowercase English letters. Word W also should consist of lowercase English letters.
Input
The first line contains integer n (1 β€ n β€ 100 000) β the length of words S and T.
The second line contains word S.
The third line contains word T.
Words S and T consist of lowercase English letters. It is guaranteed that S and T are distinct words.
Output
Print a single integer β the number of distinct words W that can be transformed to S and T due to a typo.
Examples
Input
7
reading
trading
Output
1
Input
5
sweet
sheep
Output
0
Input
3
toy
try
Output
2
Note
In the first sample test the two given words could be obtained only from word "treading" (the deleted letters are marked in bold).
In the second sample test the two given words couldn't be obtained from the same word by removing one letter.
In the third sample test the two given words could be obtained from either word "tory" or word "troy".
|
instruction
| 0
| 99,808
| 6
| 199,616
|
Tags: constructive algorithms, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
from math import *
n=int(input())
s=input()
t=input()
l=0
r=n-1
for i in range(n):
if(s[i]==t[i]):
l+=1
else:
break
for i in range(n-1,-1,-1):
if(s[i]==t[i]):
r-=1
else:
break
ans=0
if(s[l+1:r+1]==t[l:r]):
ans+=1
if(s[l:r]==t[l+1:r+1]):
ans+=1
print(ans)
```
|
output
| 1
| 99,808
| 6
| 199,617
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Analyzing the mistakes people make while typing search queries is a complex and an interesting work. As there is no guaranteed way to determine what the user originally meant by typing some query, we have to use different sorts of heuristics.
Polycarp needed to write a code that could, given two words, check whether they could have been obtained from the same word as a result of typos. Polycarpus suggested that the most common typo is skipping exactly one letter as you type a word.
Implement a program that can, given two distinct words S and T of the same length n determine how many words W of length n + 1 are there with such property that you can transform W into both S, and T by deleting exactly one character. Words S and T consist of lowercase English letters. Word W also should consist of lowercase English letters.
Input
The first line contains integer n (1 β€ n β€ 100 000) β the length of words S and T.
The second line contains word S.
The third line contains word T.
Words S and T consist of lowercase English letters. It is guaranteed that S and T are distinct words.
Output
Print a single integer β the number of distinct words W that can be transformed to S and T due to a typo.
Examples
Input
7
reading
trading
Output
1
Input
5
sweet
sheep
Output
0
Input
3
toy
try
Output
2
Note
In the first sample test the two given words could be obtained only from word "treading" (the deleted letters are marked in bold).
In the second sample test the two given words couldn't be obtained from the same word by removing one letter.
In the third sample test the two given words could be obtained from either word "tory" or word "troy".
|
instruction
| 0
| 99,809
| 6
| 199,618
|
Tags: constructive algorithms, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
import os
import sys
from io import BytesIO, IOBase
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
##########################################################
import math
import bisect
mod = 998244353
# for _ in range(int(input())):
from collections import Counter
# sys.setrecursionlimit(10**6)
# dp=[[-1 for i in range(n+5)]for j in range(cap+5)]
# arr= list(map(int, input().split()))
# n,l= map(int, input().split())
# arr= list(map(int, input().split()))
# for _ in range(int(input())):
# n=int(input())
# for _ in range(int(input())):
import bisect
from heapq import *
from collections import defaultdict,deque
def okay(x,y):
if x<0 or x>=3 :
return False
if y<n and mat[x][y]!=".":
return False
if y+1<n and mat[x][y+1]!=".":
return False
if y+2<n and mat[x][y+2]!=".":
return False
return True
'''for i in range(int(input())):
n,m=map(int, input().split())
g=[[] for i in range(n+m)]
for i in range(n):
s=input()
for j,x in enumerate(s):
if x=="#":
g[i].append(n+j)
g[n+j].append(i)
q=deque([0])
dis=[10**9]*(n+m)
dis[0]=0
while q:
node=q.popleft()
for i in g[node]:
if dis[i]>dis[node]+1:
dis[i]=dis[node]+1
q.append(i)
print(-1 if dis[n-1]==10**9 else dis[n-1])'''
'''from collections import deque
t = int(input())
for _ in range(t):
q = deque([])
flag=False
n,k = map(int, input().split())
mat = [input() for i in range(3)]
vis=[[0 for i in range(105)]for j in range(3)]
for i in range(3):
if mat[i][0]=="s":
q.append((i,0))
while q:
x,y=q.popleft()
if y+1>=n:
flag=True
break
if vis[x][y]==1:
continue
vis[x][y]=1
if (y+1<n and mat[x][y+1]=='.' and okay(x-1,y+1)==True):
q.append((x-1,y+3))
if (y+1<n and mat[x][y+1]=='.' and okay(x,y+1)==True):
q.append((x,y+3))
if (y+1<n and mat[x][y+1]=='.' and okay(x+1,y+1)==True):
q.append((x+1,y+3))
if flag:
print("YES")
else:
print("NO")
# ls=list(map(int, input().split()))
# d=defaultdict(list)'''
from collections import defaultdict
#for _ in range(int(input())):
n=int(input())
#n,k= map(int, input().split())
#arr=sorted([i,j for i,j in enumerate(input().split())])
s=input()
t=input()
n=len(s)
f=0
l=0
i=0
while s[i]==t[i]:
i+=1
j=n-1
while s[j]==t[j]:
j-=1
print(int(s[i:j]==t[i+1:j+1])+int(s[i+1:j+1]==t[i:j]))
```
|
output
| 1
| 99,809
| 6
| 199,619
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Analyzing the mistakes people make while typing search queries is a complex and an interesting work. As there is no guaranteed way to determine what the user originally meant by typing some query, we have to use different sorts of heuristics.
Polycarp needed to write a code that could, given two words, check whether they could have been obtained from the same word as a result of typos. Polycarpus suggested that the most common typo is skipping exactly one letter as you type a word.
Implement a program that can, given two distinct words S and T of the same length n determine how many words W of length n + 1 are there with such property that you can transform W into both S, and T by deleting exactly one character. Words S and T consist of lowercase English letters. Word W also should consist of lowercase English letters.
Input
The first line contains integer n (1 β€ n β€ 100 000) β the length of words S and T.
The second line contains word S.
The third line contains word T.
Words S and T consist of lowercase English letters. It is guaranteed that S and T are distinct words.
Output
Print a single integer β the number of distinct words W that can be transformed to S and T due to a typo.
Examples
Input
7
reading
trading
Output
1
Input
5
sweet
sheep
Output
0
Input
3
toy
try
Output
2
Note
In the first sample test the two given words could be obtained only from word "treading" (the deleted letters are marked in bold).
In the second sample test the two given words couldn't be obtained from the same word by removing one letter.
In the third sample test the two given words could be obtained from either word "tory" or word "troy".
|
instruction
| 0
| 99,810
| 6
| 199,620
|
Tags: constructive algorithms, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
from sys import stdin
read = stdin.readline
n = int(read())
S = read()
T = read()
for i in range(n):
if S[i] != T[i]:
break
a = b = 1
for j in range(i,n-1):
if S[j] != T[j+1]:
a = (S[j+1:] == T[j+1:])
break
for j in range(i,n-1):
if S[j+1] != T[j]:
b = (S[j+1:] == T[j+1:])
break
print(a+b)
```
|
output
| 1
| 99,810
| 6
| 199,621
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Analyzing the mistakes people make while typing search queries is a complex and an interesting work. As there is no guaranteed way to determine what the user originally meant by typing some query, we have to use different sorts of heuristics.
Polycarp needed to write a code that could, given two words, check whether they could have been obtained from the same word as a result of typos. Polycarpus suggested that the most common typo is skipping exactly one letter as you type a word.
Implement a program that can, given two distinct words S and T of the same length n determine how many words W of length n + 1 are there with such property that you can transform W into both S, and T by deleting exactly one character. Words S and T consist of lowercase English letters. Word W also should consist of lowercase English letters.
Input
The first line contains integer n (1 β€ n β€ 100 000) β the length of words S and T.
The second line contains word S.
The third line contains word T.
Words S and T consist of lowercase English letters. It is guaranteed that S and T are distinct words.
Output
Print a single integer β the number of distinct words W that can be transformed to S and T due to a typo.
Examples
Input
7
reading
trading
Output
1
Input
5
sweet
sheep
Output
0
Input
3
toy
try
Output
2
Note
In the first sample test the two given words could be obtained only from word "treading" (the deleted letters are marked in bold).
In the second sample test the two given words couldn't be obtained from the same word by removing one letter.
In the third sample test the two given words could be obtained from either word "tory" or word "troy".
|
instruction
| 0
| 99,811
| 6
| 199,622
|
Tags: constructive algorithms, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
n=int(input())
st1=input()
st2=input()
i=0
while st1[i] == st2[i]:
i+=1
j=n-1
while st1[j] == st2[j]:
j-=1
print(int(st1[i+1:j+1] == st2[i:j]) + int(st1[i:j] == st2[i+1:j+1]))
```
|
output
| 1
| 99,811
| 6
| 199,623
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Analyzing the mistakes people make while typing search queries is a complex and an interesting work. As there is no guaranteed way to determine what the user originally meant by typing some query, we have to use different sorts of heuristics.
Polycarp needed to write a code that could, given two words, check whether they could have been obtained from the same word as a result of typos. Polycarpus suggested that the most common typo is skipping exactly one letter as you type a word.
Implement a program that can, given two distinct words S and T of the same length n determine how many words W of length n + 1 are there with such property that you can transform W into both S, and T by deleting exactly one character. Words S and T consist of lowercase English letters. Word W also should consist of lowercase English letters.
Input
The first line contains integer n (1 β€ n β€ 100 000) β the length of words S and T.
The second line contains word S.
The third line contains word T.
Words S and T consist of lowercase English letters. It is guaranteed that S and T are distinct words.
Output
Print a single integer β the number of distinct words W that can be transformed to S and T due to a typo.
Examples
Input
7
reading
trading
Output
1
Input
5
sweet
sheep
Output
0
Input
3
toy
try
Output
2
Note
In the first sample test the two given words could be obtained only from word "treading" (the deleted letters are marked in bold).
In the second sample test the two given words couldn't be obtained from the same word by removing one letter.
In the third sample test the two given words could be obtained from either word "tory" or word "troy".
|
instruction
| 0
| 99,812
| 6
| 199,624
|
Tags: constructive algorithms, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
import sys
#sys.stdin = open("in.txt")
try:
while True:
n = int(input())
s1 = input()
s2 = input()
L = 0
R = n-1
while s1[L] == s2[L]:
L += 1
while s1[R] == s2[R]:
R -= 1
res = 0
i = L
while i < R and s1[i] == s2[i+1]:
i += 1
if i >= R:
res += 1
s1, s2 = s2, s1
i = L
while i < R and s1[i] == s2[i+1]:
i += 1
if i >= R:
res += 1
print(res)
except EOFError:
pass
```
|
output
| 1
| 99,812
| 6
| 199,625
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Analyzing the mistakes people make while typing search queries is a complex and an interesting work. As there is no guaranteed way to determine what the user originally meant by typing some query, we have to use different sorts of heuristics.
Polycarp needed to write a code that could, given two words, check whether they could have been obtained from the same word as a result of typos. Polycarpus suggested that the most common typo is skipping exactly one letter as you type a word.
Implement a program that can, given two distinct words S and T of the same length n determine how many words W of length n + 1 are there with such property that you can transform W into both S, and T by deleting exactly one character. Words S and T consist of lowercase English letters. Word W also should consist of lowercase English letters.
Input
The first line contains integer n (1 β€ n β€ 100 000) β the length of words S and T.
The second line contains word S.
The third line contains word T.
Words S and T consist of lowercase English letters. It is guaranteed that S and T are distinct words.
Output
Print a single integer β the number of distinct words W that can be transformed to S and T due to a typo.
Examples
Input
7
reading
trading
Output
1
Input
5
sweet
sheep
Output
0
Input
3
toy
try
Output
2
Note
In the first sample test the two given words could be obtained only from word "treading" (the deleted letters are marked in bold).
In the second sample test the two given words couldn't be obtained from the same word by removing one letter.
In the third sample test the two given words could be obtained from either word "tory" or word "troy".
|
instruction
| 0
| 99,813
| 6
| 199,626
|
Tags: constructive algorithms, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
def aux(s, t):
n = len(s)
lpr = 0
for i in range(n):
if s[i] != t[i]:
break
lpr += 1
lsf = 0
for i in range(n-1, -1, -1):
if s[i] != t[i]:
break
lsf += 1
if(lpr == n):
return 2
return (s[lpr:n-lsf-1] == t[lpr+1:n-lsf]) + (t[lpr:n-lsf-1] == s[lpr+1:n-lsf])
input(); print(aux(input(), input()))
```
|
output
| 1
| 99,813
| 6
| 199,627
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Analyzing the mistakes people make while typing search queries is a complex and an interesting work. As there is no guaranteed way to determine what the user originally meant by typing some query, we have to use different sorts of heuristics.
Polycarp needed to write a code that could, given two words, check whether they could have been obtained from the same word as a result of typos. Polycarpus suggested that the most common typo is skipping exactly one letter as you type a word.
Implement a program that can, given two distinct words S and T of the same length n determine how many words W of length n + 1 are there with such property that you can transform W into both S, and T by deleting exactly one character. Words S and T consist of lowercase English letters. Word W also should consist of lowercase English letters.
Input
The first line contains integer n (1 β€ n β€ 100 000) β the length of words S and T.
The second line contains word S.
The third line contains word T.
Words S and T consist of lowercase English letters. It is guaranteed that S and T are distinct words.
Output
Print a single integer β the number of distinct words W that can be transformed to S and T due to a typo.
Examples
Input
7
reading
trading
Output
1
Input
5
sweet
sheep
Output
0
Input
3
toy
try
Output
2
Note
In the first sample test the two given words could be obtained only from word "treading" (the deleted letters are marked in bold).
In the second sample test the two given words couldn't be obtained from the same word by removing one letter.
In the third sample test the two given words could be obtained from either word "tory" or word "troy".
|
instruction
| 0
| 99,814
| 6
| 199,628
|
Tags: constructive algorithms, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
i, j = 0, int(input()) - 1
a, b = input(), input()
while a[i] == b[i]: i += 1
while a[j] == b[j]: j -= 1
print((a[i + 1:j + 1] == b[i:j]) + (b[i + 1:j + 1] == a[i:j]))
```
|
output
| 1
| 99,814
| 6
| 199,629
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Analyzing the mistakes people make while typing search queries is a complex and an interesting work. As there is no guaranteed way to determine what the user originally meant by typing some query, we have to use different sorts of heuristics.
Polycarp needed to write a code that could, given two words, check whether they could have been obtained from the same word as a result of typos. Polycarpus suggested that the most common typo is skipping exactly one letter as you type a word.
Implement a program that can, given two distinct words S and T of the same length n determine how many words W of length n + 1 are there with such property that you can transform W into both S, and T by deleting exactly one character. Words S and T consist of lowercase English letters. Word W also should consist of lowercase English letters.
Input
The first line contains integer n (1 β€ n β€ 100 000) β the length of words S and T.
The second line contains word S.
The third line contains word T.
Words S and T consist of lowercase English letters. It is guaranteed that S and T are distinct words.
Output
Print a single integer β the number of distinct words W that can be transformed to S and T due to a typo.
Examples
Input
7
reading
trading
Output
1
Input
5
sweet
sheep
Output
0
Input
3
toy
try
Output
2
Note
In the first sample test the two given words could be obtained only from word "treading" (the deleted letters are marked in bold).
In the second sample test the two given words couldn't be obtained from the same word by removing one letter.
In the third sample test the two given words could be obtained from either word "tory" or word "troy".
|
instruction
| 0
| 99,815
| 6
| 199,630
|
Tags: constructive algorithms, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
n = int(input())
s, t = input(), input()
i = 0
while s[i] == t[i]:
i += 1
j = n - 1
while s[j] == t[j]:
j -= 1
print(int(s[i + 1:j + 1] == t[i:j]) + int(s[i:j] == t[i + 1:j + 1]))
```
|
output
| 1
| 99,815
| 6
| 199,631
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 β€ n β€ 105) β the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess β a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer β the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
|
instruction
| 0
| 100,029
| 6
| 200,058
|
Tags: implementation, strings
Correct Solution:
```
n = int(input())
alpha = [0]*(26)
c = 0
flag = 0
for i in range(n):
a,b = input().split()
if a=='.' :
b = list(set(b))
for i in b:
alpha[ord(i)-97] = -1
elif a=='!':
if alpha.count(max(alpha))==1:
if flag:
c+=1
else:
flag = 1
elif not flag:
b = list(set(b))
for i in b:
if alpha[ord(i)-97] !=-1:
alpha[ord(i)-97] += 1
else:
if flag :
if (ord(b)-97)!=alpha.index(max(alpha)) :
c+=1
else:
alpha[ord(b)-97] = -1
if alpha.count(max(alpha))==1 and not flag:
flag = 1
print(c)
```
|
output
| 1
| 100,029
| 6
| 200,059
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 β€ n β€ 105) β the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess β a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer β the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
|
instruction
| 0
| 100,030
| 6
| 200,060
|
Tags: implementation, strings
Correct Solution:
```
from collections import *
import os, sys
from io import BytesIO, IOBase
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
BUFSIZE = 8192
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
rstr = lambda: input().strip()
rstrs = lambda: [str(x) for x in input().split()]
rstr_2d = lambda n: [rstr() for _ in range(n)]
rint = lambda: int(input())
rints = lambda: [int(x) for x in input().split()]
rint_2d = lambda n: [rint() for _ in range(n)]
rints_2d = lambda n: [rints() for _ in range(n)]
ceil1 = lambda a, b: (a + b - 1) // b
mem, ans = set('abcdefghijklmnopqrstuvwxyz'), 0
for _ in range(rint() - 1):
ch, word = rstrs()
if ch == '.':
mem -= set(word)
elif ch == '?':
if len(mem) > 1:
mem.discard(word)
elif mem:
ans += 1
else:
if len(mem) == 1:
ans += 1
else:
mem &= set(word)
print(ans)
```
|
output
| 1
| 100,030
| 6
| 200,061
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 β€ n β€ 105) β the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess β a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer β the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
|
instruction
| 0
| 100,031
| 6
| 200,062
|
Tags: implementation, strings
Correct Solution:
```
n = int(input())
d = set()
for i in range(26):
d.add(chr(ord('a')+i))
chocks = 0
done = -1
for i in range(n):
s = input().split()
toR = []
if s[0] == '!':
chocks += 1
for x in d:
if not x in s[1]: toR.append(x)
for x in toR: d.remove(x)
if s[0] == '.':
for x in d:
if x in s[1]: toR.append(x)
for x in toR: d.remove(x)
if s[0] == '?':
if i!=n-1: chocks += 1
if s[1] in d: d.remove(s[1])
if len(d) == 1 and done == -1:
done = chocks
if done == -1:
print(0)
else:
print(chocks-done)
```
|
output
| 1
| 100,031
| 6
| 200,063
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 β€ n β€ 105) β the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess β a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer β the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
|
instruction
| 0
| 100,032
| 6
| 200,064
|
Tags: implementation, strings
Correct Solution:
```
'''input
5
! abc
. ad
. b
! cd
? c
'''
t = [0] * 26
e = 0
n = int(input())
if n == 1:
print(0)
quit()
for i in range(n-1):
x, y = input().split()
if x == '!':
if 1 in t:
c = [ord(p) - 97 for p in set(y)]
for x in range(26):
if not(t[x] == 1 and x in c):
t[x] = -1
else:
for l in set(y):
if t[ord(l) - 97] == 0:
t[ord(l) - 97] = 1
elif x == '.':
for l in set(y):
t[ord(l) - 97] = -1
else:
t[ord(y) - 97] = -1
if t.count(1) == 1 or (t.count(0) == 1 and max(t) == 0):
break
g = [False] * 26
for _ in range(i+1, n-1):
x, y = input().split()
if x == '!' or x == '?':
e += 1
print(e)
```
|
output
| 1
| 100,032
| 6
| 200,065
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 β€ n β€ 105) β the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess β a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer β the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
|
instruction
| 0
| 100,033
| 6
| 200,066
|
Tags: implementation, strings
Correct Solution:
```
n = int(input())
flag = False
ans = 0
curr = set([chr(x) for x in range(ord('a'), ord('z')+1)])
for i in range(n):
c,s = input().split(' ')
if c[0] == '.':
letters = set(s)
curr = curr - letters
if len(curr) == 1: flag = True
continue
if c[0] == '!':
if flag: ans += 1
else:
letters = set(s)
curr = curr & letters
if len(curr) == 1: flag = True
continue
if c[0] == '?':
guess = s[0]
if flag: ans += 1
else:
curr = curr - set(guess)
if len(curr) == 1: flag = True
if i == n-1 and len(curr) == 1 and guess in curr: ans -= 1
continue
print(ans)
```
|
output
| 1
| 100,033
| 6
| 200,067
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 β€ n β€ 105) β the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess β a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer β the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
|
instruction
| 0
| 100,034
| 6
| 200,068
|
Tags: implementation, strings
Correct Solution:
```
# reading input from stdin
numActions = int(input())
actions = []
for i in range(numActions):
tempStr = input()
if tempStr[0] == '!':
action = 'shock'
elif tempStr[0] == '.':
action = 'none'
else:
action = 'guess'
string = tempStr[2:len(tempStr)]
actions.append([action, string])
# algorithm
shockList = set()
cleanList = set()
numExtraShocks = 0
firstShock = True
for i in range(len(actions)):
action = actions[i][0]
string = actions[i][1]
if action == 'shock':
if len(shockList) == 1 or len(cleanList) == 25:
numExtraShocks += 1
for letter in string:
if firstShock == True:
if letter not in cleanList:
shockList.add(letter)
elif letter not in cleanList and letter not in shockList:
cleanList.add(letter)
if firstShock == True:
firstShock = False
newShockList = shockList.copy()
for i in range(len(list(shockList))):
string1 = list(shockList)[i]
for letter1 in string1:
if letter1 not in string:
newShockList.remove(letter1)
cleanList.add(letter1)
shockList = newShockList.copy()
elif action == 'none':
for letter in string:
if letter in shockList:
shockList.remove(letter)
cleanList.add(letter)
elif action == 'guess':
if (len(shockList) == 1 or len(cleanList) == 25) and i != len(actions) - 1:
numExtraShocks += 1
if i != len(actions) - 1:
if string[0] in shockList:
shockList.remove(string[0])
cleanList.add(string[0])
print(numExtraShocks)
```
|
output
| 1
| 100,034
| 6
| 200,069
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 β€ n β€ 105) β the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess β a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer β the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
|
instruction
| 0
| 100,035
| 6
| 200,070
|
Tags: implementation, strings
Correct Solution:
```
n = int(input())
q = []
for _ in range(n):
q.append(input().split())
s = set('abcdefghijklmnopqrstuvwxyz')
letter = q[-1][-1]
for i in range(n-1):
if q[i][0] == '!':
s &= set(q[i][1])
else:
s -= set(q[i][1])
if len(s) == 1:
cnt = 0
for j in range(i+1, n-1):
if q[j][0] != '.':
cnt += 1
print(cnt)
exit(0)
print(0)
```
|
output
| 1
| 100,035
| 6
| 200,071
|
Provide tags and a correct Python 3 solution for this coding contest problem.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 β€ n β€ 105) β the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess β a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer β the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
|
instruction
| 0
| 100,036
| 6
| 200,072
|
Tags: implementation, strings
Correct Solution:
```
n = int(input())
s = set ('abcdefghijklmnopqrstuvwxyz')
count = 0
for i in range (n):
strg = input().split()
if strg[0] == "?":
if len(s)==1 and i != n - 1:
count += 1
s -= set(strg[1])
if strg[0] == "!":
if len(s)==1:
count += 1
s = s & set(strg[1])
if strg[0] == ".":
s -= set(strg[1])
print (count)
```
|
output
| 1
| 100,036
| 6
| 200,073
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sig has built his own keyboard. Designed for ultimate simplicity, this keyboard only has 3 keys on it: the `0` key, the `1` key and the backspace key.
To begin with, he is using a plain text editor with this keyboard. This editor always displays one string (possibly empty). Just after the editor is launched, this string is empty. When each key on the keyboard is pressed, the following changes occur to the string:
* The `0` key: a letter `0` will be inserted to the right of the string.
* The `1` key: a letter `1` will be inserted to the right of the string.
* The backspace key: if the string is empty, nothing happens. Otherwise, the rightmost letter of the string is deleted.
Sig has launched the editor, and pressed these keys N times in total. As a result, the editor displays a string s. Find the number of such ways to press the keys, modulo 10^9 + 7.
Constraints
* 1 β¦ N β¦ 5000
* 1 β¦ |s| β¦ N
* s consists of the letters `0` and `1`.
Input
The input is given from Standard Input in the following format:
N
s
Output
Print the number of the ways to press the keys N times in total such that the editor displays the string s in the end, modulo 10^9+7.
Examples
Input
3
0
Output
5
Input
300
1100100
Output
519054663
Input
5000
01000001011101000100001101101111011001000110010101110010000
Output
500886057
Submitted Solution:
```
from collections import defaultdict, deque, Counter
from heapq import heappush, heappop, heapify
import math
import bisect
import random
from itertools import permutations, accumulate, combinations, product
import sys
import string
from bisect import bisect_left, bisect_right
from math import factorial, ceil, floor
from operator import mul
from functools import reduce
sys.setrecursionlimit(2147483647)
INF = 10 ** 13
def LI(): return list(map(int, sys.stdin.readline().split()))
def I(): return int(sys.stdin.readline())
def LS(): return sys.stdin.buffer.readline().rstrip().decode('utf-8').split()
def S(): return sys.stdin.buffer.readline().rstrip().decode('utf-8')
def IR(n): return [I() for i in range(n)]
def LIR(n): return [LI() for i in range(n)]
def SR(n): return [S() for i in range(n)]
def LSR(n): return [LS() for i in range(n)]
def SRL(n): return [list(S()) for i in range(n)]
def MSRL(n): return [[int(j) for j in list(S())] for i in range(n)]
mod = 10 ** 9 + 7
n = I()
s = len(input())
dp = [0] * (n + 2)
dp[0] = 1
for i in range(1, n + 1):
ndp = [0] * (n + 2)
for j in range(n + 1):
if j:
ndp[j] = (dp[j - 1] * 2 + dp[j + 1]) % mod
else:
ndp[j] = (dp[j] + dp[j + 1]) % mod
dp = ndp
print(dp[s] * pow(pow(2, s, mod), mod - 2, mod) % mod)
```
|
instruction
| 0
| 100,234
| 6
| 200,468
|
Yes
|
output
| 1
| 100,234
| 6
| 200,469
|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sig has built his own keyboard. Designed for ultimate simplicity, this keyboard only has 3 keys on it: the `0` key, the `1` key and the backspace key.
To begin with, he is using a plain text editor with this keyboard. This editor always displays one string (possibly empty). Just after the editor is launched, this string is empty. When each key on the keyboard is pressed, the following changes occur to the string:
* The `0` key: a letter `0` will be inserted to the right of the string.
* The `1` key: a letter `1` will be inserted to the right of the string.
* The backspace key: if the string is empty, nothing happens. Otherwise, the rightmost letter of the string is deleted.
Sig has launched the editor, and pressed these keys N times in total. As a result, the editor displays a string s. Find the number of such ways to press the keys, modulo 10^9 + 7.
Constraints
* 1 β¦ N β¦ 5000
* 1 β¦ |s| β¦ N
* s consists of the letters `0` and `1`.
Input
The input is given from Standard Input in the following format:
N
s
Output
Print the number of the ways to press the keys N times in total such that the editor displays the string s in the end, modulo 10^9+7.
Examples
Input
3
0
Output
5
Input
300
1100100
Output
519054663
Input
5000
01000001011101000100001101101111011001000110010101110010000
Output
500886057
Submitted Solution:
```
from collections import defaultdict, deque, Counter
from heapq import heappush, heappop, heapify
import math
import bisect
import random
from itertools import permutations, accumulate, combinations, product
import sys
import string
from bisect import bisect_left, bisect_right
from math import factorial, ceil, floor
from operator import mul
from functools import reduce
sys.setrecursionlimit(2147483647)
INF = 10 ** 13
def LI(): return list(map(int, sys.stdin.readline().split()))
def I(): return int(sys.stdin.readline())
def LS(): return sys.stdin.buffer.readline().rstrip().decode('utf-8').split()
def S(): return sys.stdin.buffer.readline().rstrip().decode('utf-8')
def IR(n): return [I() for i in range(n)]
def LIR(n): return [LI() for i in range(n)]
def SR(n): return [S() for i in range(n)]
def LSR(n): return [LS() for i in range(n)]
def SRL(n): return [list(S()) for i in range(n)]
def MSRL(n): return [[int(j) for j in list(S())] for i in range(n)]
mod = 10 ** 9 + 7
n = I()
s = len(input())
dp = [[0] * (2 * s + 2) for _ in range(n + 1)]
dp[0][0] = 1
for i in range(1, n + 1):
for j in range(min(i + 1, 2 * s + 1)):
if j:
dp[i][j] = dp[i - 1][j - 1] * 2 + dp[i - 1][j + 1] % mod
else:
dp[i][j] = dp[i - 1][j] + dp[i - 1][j + 1] % mod
print(dp[n][s] * pow(pow(2, s, mod), mod - 2, mod) % mod)
```
|
instruction
| 0
| 100,235
| 6
| 200,470
|
No
|
output
| 1
| 100,235
| 6
| 200,471
|
Provide a correct Python 3 solution for this coding contest problem.
A: Alphabet block
Wakana Nakawa loves palindromes. Because my name is also a palindrome.
Wakana got a set with some alphabet blocks. An alphabet block is a block in which one lowercase alphabet is written for each block, and you can create your favorite character string by changing the order of the blocks and combining them. Wakana is wondering if she can make a palindrome with this set.
The following three types of operations are possible in the set of alphabet blocks, and the cost of each operation is 1.
1. Add one alphabet block (any letter is listed)
2. Change one alphabet block you have to another block (whatever the letters are listed)
3. Delete one alphabet block you currently have
I want to make a set that can be rearranged into palindromes by operating the set of alphabet blocks several times. What is the minimum cost of such an operation? Let's think with Wakana-chan.
Input
The input consists of one line of the string S that points to the information in the first set of alphabet blocks.
S consists of lowercase letters only and satisfies 1 \ leq | S | \ leq 10 ^ 3.
Output
Output the minimum cost for creating a palindrome. Don't forget the newline at the end.
Sample Input 1
hcpc
Sample Output 1
1
In this case, a palindrome can be created at a cost of 1, but multiple methods are possible. For example, if you add a block of'h', you can make a'hcpch', so you can make a palindrome at a cost of 1. Also, if you delete the block of'h', you can make'cpc', so you can make a palindrome with this method at cost 1.
Sample Input 2
ritscamp
Sample Output 2
Four
Sample Input 3
nakawawakana
Sample Output 3
0
If you can create a palindrome from scratch, the cost is zero.
Example
Input
hcpc
Output
1
|
instruction
| 0
| 100,288
| 6
| 200,576
|
"Correct Solution:
```
s = input()
cnt = [0]*26
for x in s:
cnt[ord(x)-ord('a')] += 1
print(sum([x%2 for x in cnt])//2)
```
|
output
| 1
| 100,288
| 6
| 200,577
|
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