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Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Recently, the Fair Nut has written k strings of length n, consisting of letters "a" and "b". He calculated c β€” the number of strings that are prefixes of at least one of the written strings. Eve...
instruction
0
50,516
0
101,032
Yes
output
1
50,516
0
101,033
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Recently, the Fair Nut has written k strings of length n, consisting of letters "a" and "b". He calculated c β€” the number of strings that are prefixes of at least one of the written strings. Eve...
instruction
0
50,517
0
101,034
Yes
output
1
50,517
0
101,035
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Recently, the Fair Nut has written k strings of length n, consisting of letters "a" and "b". He calculated c β€” the number of strings that are prefixes of at least one of the written strings. Eve...
instruction
0
50,518
0
101,036
Yes
output
1
50,518
0
101,037
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Recently, the Fair Nut has written k strings of length n, consisting of letters "a" and "b". He calculated c β€” the number of strings that are prefixes of at least one of the written strings. Eve...
instruction
0
50,519
0
101,038
Yes
output
1
50,519
0
101,039
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Recently, the Fair Nut has written k strings of length n, consisting of letters "a" and "b". He calculated c β€” the number of strings that are prefixes of at least one of the written strings. Eve...
instruction
0
50,520
0
101,040
No
output
1
50,520
0
101,041
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Recently, the Fair Nut has written k strings of length n, consisting of letters "a" and "b". He calculated c β€” the number of strings that are prefixes of at least one of the written strings. Eve...
instruction
0
50,521
0
101,042
No
output
1
50,521
0
101,043
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Recently, the Fair Nut has written k strings of length n, consisting of letters "a" and "b". He calculated c β€” the number of strings that are prefixes of at least one of the written strings. Eve...
instruction
0
50,522
0
101,044
No
output
1
50,522
0
101,045
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Recently, the Fair Nut has written k strings of length n, consisting of letters "a" and "b". He calculated c β€” the number of strings that are prefixes of at least one of the written strings. Eve...
instruction
0
50,523
0
101,046
No
output
1
50,523
0
101,047
Provide tags and a correct Python 3 solution for this coding contest problem. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For example, if the string is equal to "xaax" than th...
instruction
0
50,524
0
101,048
Tags: data structures, implementation, math Correct Solution: ``` s = input() left = ['*'] cnt = 0 for ch in s: if ch == left[-1]: left.pop() cnt += 1 else: left.append(ch) print(['No', 'Yes'][cnt%2]) ```
output
1
50,524
0
101,049
Provide tags and a correct Python 3 solution for this coding contest problem. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For example, if the string is equal to "xaax" than th...
instruction
0
50,525
0
101,050
Tags: data structures, implementation, math Correct Solution: ``` # test ramim's code string = input() s = [] c = 0 for i in range(len(string)): if s and s[-1] == string[i]: s.pop() c+=1 else: s.append(string[i]) if c&1:print('Yes') else:print('No') ```
output
1
50,525
0
101,051
Provide tags and a correct Python 3 solution for this coding contest problem. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For example, if the string is equal to "xaax" than th...
instruction
0
50,526
0
101,052
Tags: data structures, implementation, math Correct Solution: ``` s=input() ct=0 i=0 stk=[] while(i<len(s)): if len(stk)!=0 and stk[-1]==s[i]: ct+=1 stk.pop() else: stk.append(s[i]) i+=1 if ct%2==1: print("Yes") else: print("No") ```
output
1
50,526
0
101,053
Provide tags and a correct Python 3 solution for this coding contest problem. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For example, if the string is equal to "xaax" than th...
instruction
0
50,527
0
101,054
Tags: data structures, implementation, math Correct Solution: ``` import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,copy,functools import random sys.setrecursionlimit(10**7) inf = 10**20 eps = 1.0 / 10**10 mod = 10**9+7 dd = [(-1,0),(0,1),(1,0),(0,-1)] ddn = [(-1,0),(-1,1),(0,1),(1,1),(1,0),...
output
1
50,527
0
101,055
Provide tags and a correct Python 3 solution for this coding contest problem. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For example, if the string is equal to "xaax" than th...
instruction
0
50,528
0
101,056
Tags: data structures, implementation, math Correct Solution: ``` counter=0 s=list(input()) n=len(s) ans=['#'] for i in range(0,n): if s[i]==ans[-1]: counter+=1 ans.pop() else: ans.append(s[i]) if counter%2==0: print("No") else: print("Yes") ```
output
1
50,528
0
101,057
Provide tags and a correct Python 3 solution for this coding contest problem. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For example, if the string is equal to "xaax" than th...
instruction
0
50,529
0
101,058
Tags: data structures, implementation, math Correct Solution: ``` s='0'+input() tot=[' '] counter=0 for i in range(len(s)): if s[i]==tot[-1]: tot.pop() counter+=1 else: tot.append(s[i]) if counter%2==0: print('No') else: print('Yes') ```
output
1
50,529
0
101,059
Provide tags and a correct Python 3 solution for this coding contest problem. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For example, if the string is equal to "xaax" than th...
instruction
0
50,530
0
101,060
Tags: data structures, implementation, math Correct Solution: ``` palavra = input() resp = "No" pilha = [] i = 0 while(i <= len(palavra) - 1): if(len(pilha) == 0): pilha.append(palavra[i]) elif(pilha[-1] == palavra[i]): pilha.pop() if(resp == "No"): resp = "Yes" else: resp = "No" else...
output
1
50,530
0
101,061
Provide tags and a correct Python 3 solution for this coding contest problem. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For example, if the string is equal to "xaax" than th...
instruction
0
50,531
0
101,062
Tags: data structures, implementation, math Correct Solution: ``` s = input() k = 0 class Stack: def __init__(self): self.data = [] def pop(self): return self.data.pop() def push(self, x): self.data.append(x) def isempty(self): ...
output
1
50,531
0
101,063
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For ex...
instruction
0
50,532
0
101,064
Yes
output
1
50,532
0
101,065
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For ex...
instruction
0
50,533
0
101,066
Yes
output
1
50,533
0
101,067
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For ex...
instruction
0
50,534
0
101,068
Yes
output
1
50,534
0
101,069
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For ex...
instruction
0
50,535
0
101,070
Yes
output
1
50,535
0
101,071
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For ex...
instruction
0
50,536
0
101,072
No
output
1
50,536
0
101,073
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For ex...
instruction
0
50,537
0
101,074
No
output
1
50,537
0
101,075
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For ex...
instruction
0
50,538
0
101,076
No
output
1
50,538
0
101,077
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Two people are playing a game with a string s, consisting of lowercase latin letters. On a player's turn, he should choose two consecutive equal letters in the string and delete them. For ex...
instruction
0
50,539
0
101,078
No
output
1
50,539
0
101,079
Provide tags and a correct Python 3 solution for this coding contest problem. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowercase English letters (that is, the string's lengt...
instruction
0
50,793
0
101,586
Tags: greedy Correct Solution: ``` import sys n, k = map(int, sys.stdin.readline().split()) if k > n or (k == 1 and n != 1): print(-1) else: l = [" " for i in range(n)] last = ord("a")+k-1 m = n-1 for i in range(k-2): l[m] = chr(last-i) m -= 1 start = ord("a") for i in range...
output
1
50,793
0
101,587
Provide tags and a correct Python 3 solution for this coding contest problem. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowercase English letters (that is, the string's lengt...
instruction
0
50,795
0
101,590
Tags: greedy Correct Solution: ``` # coding: utf-8 letter = [chr(ord('a')+i) for i in range(26)] n, k = [int(i) for i in input().split()] if k>n or (k==1 and n>1): print(-1) exit() if k==1: print('a') exit() ans = [letter[i%2] for i in range(n-k+2)] ans += [letter[2+i] for i in range(k-2)] print(''.join...
output
1
50,795
0
101,591
Provide tags and a correct Python 3 solution for this coding contest problem. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowercase English letters (that is, the string's lengt...
instruction
0
50,796
0
101,592
Tags: greedy Correct Solution: ``` from string import ascii_lowercase n, k = [int(x) for x in input().split()] if n == 1 and k == 1: print('a') exit(0) if n < k or k == 1: print(-1) exit(0) print('ab' * ((n - k + 2) // 2) + ('a' if (n + k) % 2 == 1 else '') + ascii_lowercase[2: k]) ```
output
1
50,796
0
101,593
Provide tags and a correct Python 3 solution for this coding contest problem. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowercase English letters (that is, the string's lengt...
instruction
0
50,797
0
101,594
Tags: greedy Correct Solution: ``` alphabet = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"] string = input() numbers = string.split() a, b = int(numbers[0]), int(numbers[1]) condition = a > 1 and b == 1 if b > a or condition: print...
output
1
50,797
0
101,595
Provide tags and a correct Python 3 solution for this coding contest problem. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowercase English letters (that is, the string's lengt...
instruction
0
50,798
0
101,596
Tags: greedy Correct Solution: ``` n,k=map(int,input().split()) if k>n: print(-1) elif k==1: if n==1: print('a') else: print(-1) else: alph="" for i in range(26): alph+=(chr(i+97)) ans=alph[:k] n-=k if n%2: z=ans[0]+ans[1]+'ab'*(n//2)+'a'+ans[2:] else: z=ans[0]+ans[1]+'ab'*(n//2)+ans[2:] print(z) ``...
output
1
50,798
0
101,597
Provide tags and a correct Python 3 solution for this coding contest problem. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowercase English letters (that is, the string's lengt...
instruction
0
50,799
0
101,598
Tags: greedy Correct Solution: ``` import sys import math n, k = [int(x) for x in (sys.stdin.readline()).split()] if(k == 1 and n == 1): print("a") exit() if(k == 1 or k > n): print(-1) exit() res = ['a', 'b'] * (int(n / 2)) if(n % 2 != 0): res.append('a') t = 2 for i in range(n - (k - 2), n)...
output
1
50,799
0
101,599
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowerca...
instruction
0
50,800
0
101,600
Yes
output
1
50,800
0
101,601
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowerca...
instruction
0
50,801
0
101,602
Yes
output
1
50,801
0
101,603
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowerca...
instruction
0
50,802
0
101,604
Yes
output
1
50,802
0
101,605
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowerca...
instruction
0
50,803
0
101,606
Yes
output
1
50,803
0
101,607
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowerca...
instruction
0
50,804
0
101,608
No
output
1
50,804
0
101,609
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowerca...
instruction
0
50,805
0
101,610
No
output
1
50,805
0
101,611
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowerca...
instruction
0
50,806
0
101,612
No
output
1
50,806
0
101,613
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Little penguin Polo adores strings. But most of all he adores strings of length n. One day he wanted to find a string that meets the following conditions: 1. The string consists of n lowerca...
instruction
0
50,807
0
101,614
No
output
1
50,807
0
101,615
Provide tags and a correct Python 3 solution for this coding contest problem. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its set of letters is a subset of the set of letters...
instruction
0
51,043
0
102,086
Tags: constructive algorithms, implementation, strings Correct Solution: ``` def f(s,k,n): l=sorted(list(set(s))) if len(s)<k: return s+l[0]*(k-len(s)) s=s[:k] ll=len(l) t="" kk=k for i in range(len(s)-1,-1,-1): # print(t,"sss",len(t)) if l.index(s[i])!=ll-1: t=l[l.index(s[i])+1]+t break else: ...
output
1
51,043
0
102,087
Provide tags and a correct Python 3 solution for this coding contest problem. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its set of letters is a subset of the set of letters...
instruction
0
51,044
0
102,088
Tags: constructive algorithms, implementation, strings Correct Solution: ``` n, k = list(map(int, input().split())) s = input()[:n] digs = set(s) mind = min(digs) maxd = max(digs) if n<k: print (s+mind*(k-n)) exit() for i in range(min(n,k)-1, -1, -1): if s[i]<maxd: biggerchars = [ch for ch in digs...
output
1
51,044
0
102,089
Provide tags and a correct Python 3 solution for this coding contest problem. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its set of letters is a subset of the set of letters...
instruction
0
51,045
0
102,090
Tags: constructive algorithms, implementation, strings Correct Solution: ``` n,k=map(int,input().split()) s=input() l=sorted(list(set(list(s)))) if k<=n: for i in range(k-1,-1,-1): z=[] for j in l: if s[i]<j: z.append(j) if len(z)>0: z.sort() t=s[:i]+z[0]+l[0]*(k-i-1) break else: t=s+(k-n)*l[0] ...
output
1
51,045
0
102,091
Provide tags and a correct Python 3 solution for this coding contest problem. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its set of letters is a subset of the set of letters...
instruction
0
51,046
0
102,092
Tags: constructive algorithms, implementation, strings Correct Solution: ``` def solve(): n, k = map(int, input().split()) S = input() L = list(set(list(map(ord,S)))) L.sort() I = {} for i, l in enumerate(L): I[l] = i first = L[0] last = L[-1] res = "" if k > n: ...
output
1
51,046
0
102,093
Provide tags and a correct Python 3 solution for this coding contest problem. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its set of letters is a subset of the set of letters...
instruction
0
51,047
0
102,094
Tags: constructive algorithms, implementation, strings Correct Solution: ``` a,b = map(int,input().split()) s = input() f = s[::-1] cn = 0 d = sorted(set(s)) l = list(d) ans = "" if b>a: print(s+d[0]*(b-a)) else: for i in range(1,b+1): if s[b-i]==d[-1]: ans+=d[0] cn+=1 el...
output
1
51,047
0
102,095
Provide tags and a correct Python 3 solution for this coding contest problem. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its set of letters is a subset of the set of letters...
instruction
0
51,048
0
102,096
Tags: constructive algorithms, implementation, strings Correct Solution: ``` n,k = map(int,input().split()) s = list(input()) aa='abcdefghijklmnopqrstuvwxyz' has=[0]*26 for i in s: has[ord(i)-ord('a')]=1 if k>n: i=0 while has[i]==0: i+=1 ans=''.join(s) + (k-n)*(aa[i]) print(ans) exit()...
output
1
51,048
0
102,097
Provide tags and a correct Python 3 solution for this coding contest problem. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its set of letters is a subset of the set of letters...
instruction
0
51,049
0
102,098
Tags: constructive algorithms, implementation, strings Correct Solution: ``` n,k = map(int,input().split(" ")) s = list(input()) s1 = s[:] s2 = sorted(list(set(s))) if k == 1: for ch in s2: if s1[0] < ch: print(ch) exit(0) if n < k: s1.extend([s2[0]]*(k-n)) t = "".join(s1) print(t) else: for i in range(...
output
1
51,049
0
102,099
Provide tags and a correct Python 3 solution for this coding contest problem. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its set of letters is a subset of the set of letters...
instruction
0
51,050
0
102,100
Tags: constructive algorithms, implementation, strings Correct Solution: ``` def run(): n, k = map(int, input().split()) s = input() s_sorted = sorted(set(s)) big = s_sorted[-1] small = s_sorted[0] if k > n: t = s + ''.join([small] * (k - n)) else: if len(s) == 1: ...
output
1
51,050
0
102,101
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its s...
instruction
0
51,051
0
102,102
Yes
output
1
51,051
0
102,103
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its s...
instruction
0
51,052
0
102,104
Yes
output
1
51,052
0
102,105
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its s...
instruction
0
51,053
0
102,106
Yes
output
1
51,053
0
102,107
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. And where the are the phone numbers? You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its s...
instruction
0
51,054
0
102,108
Yes
output
1
51,054
0
102,109