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Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length n. Each character of Kevin's string represents Kevi...
instruction
0
69,427
0
138,854
Yes
output
1
69,427
0
138,855
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length n. Each character of Kevin's string represents Kevi...
instruction
0
69,428
0
138,856
Yes
output
1
69,428
0
138,857
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length n. Each character of Kevin's string represents Kevi...
instruction
0
69,429
0
138,858
Yes
output
1
69,429
0
138,859
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length n. Each character of Kevin's string represents Kevi...
instruction
0
69,430
0
138,860
Yes
output
1
69,430
0
138,861
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length n. Each character of Kevin's string represents Kevi...
instruction
0
69,431
0
138,862
No
output
1
69,431
0
138,863
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length n. Each character of Kevin's string represents Kevi...
instruction
0
69,432
0
138,864
No
output
1
69,432
0
138,865
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length n. Each character of Kevin's string represents Kevi...
instruction
0
69,433
0
138,866
No
output
1
69,433
0
138,867
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length n. Each character of Kevin's string represents Kevi...
instruction
0
69,434
0
138,868
No
output
1
69,434
0
138,869
Provide a correct Python 3 solution for this coding contest problem. A linear congruential generator produces a series R(⋅) of pseudo-random numbers by the following for- mulas: <image> where S, A, C, and M are all parameters. In this problem, 0 ≤ S, A, C ≤ 15 and M = 256. Now suppose we have some input string I(⋅)...
instruction
0
69,776
0
139,552
"Correct Solution: ``` import math M = 256 def entropy_if_smallest(ctr,bound): ret = 0 for v in ctr: if v == 0: continue ret -= (v / N) * math.log2(v / N) if ret >= bound: return None return ret def solve(src): ans_h = float('inf') ans = None for s in range(...
output
1
69,776
0
139,553
Provide a correct Python 3 solution for this coding contest problem. A linear congruential generator produces a series R(⋅) of pseudo-random numbers by the following for- mulas: <image> where S, A, C, and M are all parameters. In this problem, 0 ≤ S, A, C ≤ 15 and M = 256. Now suppose we have some input string I(⋅)...
instruction
0
69,777
0
139,554
"Correct Solution: ``` import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time,copy,functools sys.setrecursionlimit(10**7) inf = 10**20 eps = 1.0 / 10**10 mod = 998244353 def LI(): return [int(x) for x in sys.stdin.readline().split()] def LI_(): return [int(x)-1 for x in sys.stdin.rea...
output
1
69,777
0
139,555
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fors" is not. The length of the substring is th...
instruction
0
69,840
0
139,680
Tags: implementation, strings Correct Solution: ``` n=int(input()) s=list(input()) if sorted(s)[0]==sorted(s)[n-1]: print('NO') else: print('YES') for i in range(0,n-1): if s[i]!=s[i+1] : g=s[i]+s[i+1] print(g) exit() ```
output
1
69,840
0
139,681
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fors" is not. The length of the substring is th...
instruction
0
69,841
0
139,682
Tags: implementation, strings Correct Solution: ``` def test_0(): # A - import math from collections import Counter n = list(map(int, input().split(" ")))[0] ss = input() aa = '' for i in range(n-1): if ss[i] != ss[i+1]: aa = ss[i: i+2] break if aa == '': ...
output
1
69,841
0
139,683
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fors" is not. The length of the substring is th...
instruction
0
69,842
0
139,684
Tags: implementation, strings Correct Solution: ``` n = int(input()) s = input() for i in range(n - 1): if s[i] != s[i + 1]: print('YES\n' + s[i] + s[i + 1]) break else: print('NO') ```
output
1
69,842
0
139,685
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fors" is not. The length of the substring is th...
instruction
0
69,843
0
139,686
Tags: implementation, strings Correct Solution: ``` n = int(input()) s = input() for i in range(len(s)-1): if s[i] != s[i+1]: print('YES') print(s[i]+s[i+1]) break else:print('NO') ```
output
1
69,843
0
139,687
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fors" is not. The length of the substring is th...
instruction
0
69,844
0
139,688
Tags: implementation, strings Correct Solution: ``` N=int(input()) a=list(input()) if(a.count(a[0])==N): print("NO") else: for i in range(0,N-1): if(a[i]!=a[i+1]): S=a[i]+a[i+1] break print("YES") print(S) ```
output
1
69,844
0
139,689
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fors" is not. The length of the substring is th...
instruction
0
69,845
0
139,690
Tags: implementation, strings Correct Solution: ``` n = int(input()) l1 = list(input()) if len(set(l1))>=2: print("YES") print("".join(list(set(l1))[:2])) else: print("NO") ```
output
1
69,845
0
139,691
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fors" is not. The length of the substring is th...
instruction
0
69,846
0
139,692
Tags: implementation, strings Correct Solution: ``` from sys import stdin from collections import Counter n = stdin.readline() s = stdin.readline().rstrip() def solve(s): for i in range(len(s) - 1): if s[i] != s[i + 1]: print("YES") print(s[i:i+2]) return print("NO"...
output
1
69,846
0
139,693
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fors" is not. The length of the substring is th...
instruction
0
69,847
0
139,694
Tags: implementation, strings Correct Solution: ``` n, s = int(input()), input() for i in range(1,n): if s[i-1] != s[i]: print('YES\n',s[i-1],s[i],sep='') break else: print('NO') ```
output
1
69,847
0
139,695
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fo...
instruction
0
69,848
0
139,696
Yes
output
1
69,848
0
139,697
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fo...
instruction
0
69,849
0
139,698
Yes
output
1
69,849
0
139,699
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fo...
instruction
0
69,850
0
139,700
Yes
output
1
69,850
0
139,701
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fo...
instruction
0
69,851
0
139,702
Yes
output
1
69,851
0
139,703
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fo...
instruction
0
69,852
0
139,704
No
output
1
69,852
0
139,705
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fo...
instruction
0
69,853
0
139,706
No
output
1
69,853
0
139,707
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fo...
instruction
0
69,854
0
139,708
No
output
1
69,854
0
139,709
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a string s, consisting of n lowercase Latin letters. A substring of string s is a continuous segment of letters from s. For example, "defor" is a substring of "codeforces" and "fo...
instruction
0
69,855
0
139,710
No
output
1
69,855
0
139,711
Provide tags and a correct Python 3 solution for this coding contest problem. Nam is playing with a string on his computer. The string consists of n lowercase English letters. It is meaningless, so Nam decided to make the string more beautiful, that is to make it be a palindrome by using 4 arrow keys: left, right, up,...
instruction
0
70,196
0
140,392
Tags: brute force, greedy, implementation Correct Solution: ``` import math content_length, current_position = map(int, input().split()) middle_position = math.ceil(content_length / 2) text = input() answer = 0 first_need_change = -1 last_need_change = -1 for index in range(middle_position): left_char = text[ind...
output
1
70,196
0
140,393
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Nam is playing with a string on his computer. The string consists of n lowercase English letters. It is meaningless, so Nam decided to make the string more beautiful, that is to make it be a pal...
instruction
0
70,203
0
140,406
Yes
output
1
70,203
0
140,407
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Nam is playing with a string on his computer. The string consists of n lowercase English letters. It is meaningless, so Nam decided to make the string more beautiful, that is to make it be a pal...
instruction
0
70,204
0
140,408
Yes
output
1
70,204
0
140,409
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Nam is playing with a string on his computer. The string consists of n lowercase English letters. It is meaningless, so Nam decided to make the string more beautiful, that is to make it be a pal...
instruction
0
70,205
0
140,410
Yes
output
1
70,205
0
140,411
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Nam is playing with a string on his computer. The string consists of n lowercase English letters. It is meaningless, so Nam decided to make the string more beautiful, that is to make it be a pal...
instruction
0
70,206
0
140,412
Yes
output
1
70,206
0
140,413
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Nam is playing with a string on his computer. The string consists of n lowercase English letters. It is meaningless, so Nam decided to make the string more beautiful, that is to make it be a pal...
instruction
0
70,207
0
140,414
No
output
1
70,207
0
140,415
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Nam is playing with a string on his computer. The string consists of n lowercase English letters. It is meaningless, so Nam decided to make the string more beautiful, that is to make it be a pal...
instruction
0
70,208
0
140,416
No
output
1
70,208
0
140,417
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Nam is playing with a string on his computer. The string consists of n lowercase English letters. It is meaningless, so Nam decided to make the string more beautiful, that is to make it be a pal...
instruction
0
70,209
0
140,418
No
output
1
70,209
0
140,419
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Nam is playing with a string on his computer. The string consists of n lowercase English letters. It is meaningless, so Nam decided to make the string more beautiful, that is to make it be a pal...
instruction
0
70,210
0
140,420
No
output
1
70,210
0
140,421
Provide tags and a correct Python 3 solution for this coding contest problem. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of string S is equal to the j-th. Input The single ...
instruction
0
70,211
0
140,422
Tags: strings Correct Solution: ``` s = input() flags = {} n = 0 for c in s: flags[c] = 0 for c in s: n += flags[c] * 2 n += 1 flags[c] += 1 print(n) ```
output
1
70,211
0
140,423
Provide tags and a correct Python 3 solution for this coding contest problem. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of string S is equal to the j-th. Input The single ...
instruction
0
70,212
0
140,424
Tags: strings Correct Solution: ``` a=list(input()) b=[] for i in set(a): b.append(a.count(i)) print(sum(i**2 for i in b)) ```
output
1
70,212
0
140,425
Provide tags and a correct Python 3 solution for this coding contest problem. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of string S is equal to the j-th. Input The single ...
instruction
0
70,213
0
140,426
Tags: strings Correct Solution: ``` s = input() d = {} for c in s: d[c] = d.get(c, 0 ) + 1 ans = 0 for i in d.values(): ans += i ** 2 print(ans) ```
output
1
70,213
0
140,427
Provide tags and a correct Python 3 solution for this coding contest problem. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of string S is equal to the j-th. Input The single ...
instruction
0
70,214
0
140,428
Tags: strings Correct Solution: ``` a=list(input()) s=0 b=[] for i in a: if i not in b: b.append(i) l=a.count(i) s= s + l**2 print(s) ```
output
1
70,214
0
140,429
Provide tags and a correct Python 3 solution for this coding contest problem. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of string S is equal to the j-th. Input The single ...
instruction
0
70,215
0
140,430
Tags: strings Correct Solution: ``` s= input() f={} for j in s: if j not in f: f[j]=1 else: f[j]+=1 ans=0 for k in f.keys(): ans+=f[k] ans+=(f[k]-1)*(f[k]) print(ans) ```
output
1
70,215
0
140,431
Provide tags and a correct Python 3 solution for this coding contest problem. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of string S is equal to the j-th. Input The single ...
instruction
0
70,216
0
140,432
Tags: strings Correct Solution: ``` a=list(input());s=0 for i in set(a): s+=(a.count(i))**2 print(s) ```
output
1
70,216
0
140,433
Provide tags and a correct Python 3 solution for this coding contest problem. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of string S is equal to the j-th. Input The single ...
instruction
0
70,217
0
140,434
Tags: strings Correct Solution: ``` s = list(input()) ans = len(s) dic = {} for item in s: if item not in dic: dic[item] = 1 else: dic[item] += 1 for item in dic.keys(): ans += dic[item] * (dic[item] - 1) print(ans) ```
output
1
70,217
0
140,435
Provide tags and a correct Python 3 solution for this coding contest problem. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of string S is equal to the j-th. Input The single ...
instruction
0
70,218
0
140,436
Tags: strings Correct Solution: ``` s=input() d={} sum=0 for i in s: d[i]=d.get(i,0)+1 for each in d.values(): sum+=each**2 print(sum) ```
output
1
70,218
0
140,437
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of str...
instruction
0
70,219
0
140,438
Yes
output
1
70,219
0
140,439
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of str...
instruction
0
70,220
0
140,440
Yes
output
1
70,220
0
140,441
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of str...
instruction
0
70,222
0
140,444
Yes
output
1
70,222
0
140,445
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of str...
instruction
0
70,223
0
140,446
No
output
1
70,223
0
140,447
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of str...
instruction
0
70,224
0
140,448
No
output
1
70,224
0
140,449
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of str...
instruction
0
70,225
0
140,450
No
output
1
70,225
0
140,451
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that 1. 1 ≤ i, j ≤ N 2. S[i] = S[j], that is the i-th symbol of str...
instruction
0
70,226
0
140,452
No
output
1
70,226
0
140,453