message stringlengths 2 23.8k | message_type stringclasses 2
values | message_id int64 0 1 | conversation_id int64 97 109k | cluster float64 0 0 | __index_level_0__ int64 194 217k |
|---|---|---|---|---|---|
Provide tags and a correct Python 3 solution for this coding contest problem.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the player has to select a contiguous substring cons... | instruction | 0 | 106,221 | 0 | 212,442 |
Tags: games
Correct Solution:
```
import sys
input = sys.stdin.readline
t = int(input())
for _ in range(t):
a,b = map(int,input().split())
s = input()
n = len(s)
ls = []
if s[0] == ".":
cnt = 1
else:
cnt = 0
for i in range(1,n+1):
if i < n and s[i] == ".":
cnt += 1
else:
if cnt... | output | 1 | 106,221 | 0 | 212,443 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the player has to select a contiguous substring cons... | instruction | 0 | 106,222 | 0 | 212,444 |
Tags: games
Correct Solution:
```
import sys
from itertools import groupby
readline = sys.stdin.readline
t = int(input())
for _ in range(t):
a, b = map(int, readline().split())
dots = [len(list(v))
for k, v in groupby(readline().rstrip()) if k == '.']
lose = 0
med = 0
long = 0
longes... | output | 1 | 106,222 | 0 | 212,445 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the player has to select a contiguous substring cons... | instruction | 0 | 106,223 | 0 | 212,446 |
Tags: games
Correct Solution:
```
# import sys
# input = sys.stdin.readline
Q = int(input())
for _ in range(Q):
a, b = map(int, input().split())
S = input() + "X"
s = 0
x = x1 = x2 = x3 = xx = 0
for i in range(len(S)):
if S[i] == "X":
if s < b:
pass
e... | output | 1 | 106,223 | 0 | 212,447 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the player has to select a contiguous substring cons... | instruction | 0 | 106,224 | 0 | 212,448 |
Tags: games
Correct Solution:
```
import os, sys
# zeilen = [l.strip() for l in sys.stdin.readlines()]
q = int(sys.stdin.readline().strip())
for _ in range(q):
a, b = map(int, sys.stdin.readline().strip().split())
word = sys.stdin.readline().strip()
gaps = sorted([len(gap) for gap in word.split('X') if len(g... | output | 1 | 106,224 | 0 | 212,449 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the player has to select a contiguous substring cons... | instruction | 0 | 106,225 | 0 | 212,450 |
Tags: games
Correct Solution:
```
import sys
input = sys.stdin.readline
q=int(input())
for testcases in range(q):
a,b=map(int,input().split())
S=input().strip()
S+="X"
T=[]
NOW=0
for s in S:
if s==".":
NOW+=1
else:
if NOW!=0:
T.append(N... | output | 1 | 106,225 | 0 | 212,451 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the player has to select a contiguous substring cons... | instruction | 0 | 106,226 | 0 | 212,452 |
Tags: games
Correct Solution:
```
def sol():
a, b = map(int, input().split())
s = input().replace("X", " ")
small_segs = 0
critical_region = -1
for p in map(len, s.split()):
if p < b:
continue
if p < a and p >= b:
return False
if ((p - a) % 2 == ... | output | 1 | 106,226 | 0 | 212,453 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the player has to select a contiguous substring cons... | instruction | 0 | 106,227 | 0 | 212,454 |
Tags: games
Correct Solution:
```
q = int(input())
for rwer in range(q):
a, b = map(int,input().split())
s = input()
tab = []
count = 0
for i in range(len(s)):
if s[i] == '.':
count += 1
if s[i] == 'X':
if count > 0:
tab.append(count)
count = 0
if count > 0:
tab.append(count)
#print(tab)
bat... | output | 1 | 106,227 | 0 | 212,455 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the player has to select a contiguous substring cons... | instruction | 0 | 106,228 | 0 | 212,456 |
Tags: games
Correct Solution:
```
def removeX(s,p):
if (p==len(s)):
return s
while s[p]!='X':
p+=1
if (p==len(s)):
return s
j=0
while s[p+j]=='X':
j+=1
if (p+j==len(s)):
break
return removeX(s[0:p+1]+s[p+j:],p+1)
def doable(lenght,a,b,parity):
for x in range((lenght-a)//2+1):
y=lenght-a-x
#p... | output | 1 | 106,228 | 0 | 212,457 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the p... | instruction | 0 | 106,229 | 0 | 212,458 |
Yes | output | 1 | 106,229 | 0 | 212,459 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the p... | instruction | 0 | 106,230 | 0 | 212,460 |
Yes | output | 1 | 106,230 | 0 | 212,461 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the p... | instruction | 0 | 106,231 | 0 | 212,462 |
Yes | output | 1 | 106,231 | 0 | 212,463 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the p... | instruction | 0 | 106,232 | 0 | 212,464 |
Yes | output | 1 | 106,232 | 0 | 212,465 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the p... | instruction | 0 | 106,233 | 0 | 212,466 |
No | output | 1 | 106,233 | 0 | 212,467 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the p... | instruction | 0 | 106,234 | 0 | 212,468 |
No | output | 1 | 106,234 | 0 | 212,469 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the p... | instruction | 0 | 106,235 | 0 | 212,470 |
No | output | 1 | 106,235 | 0 | 212,471 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Alice and Bob play a game. Initially they have a string s_1, s_2, ..., s_n, consisting of only characters . and X. They take alternating turns, and Alice is moving first. During each turn, the p... | instruction | 0 | 106,236 | 0 | 212,472 |
No | output | 1 | 106,236 | 0 | 212,473 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider the following process. You have a binary string (a string where each character is either 0 or 1) w of length n and an integer x. You build a new binary string s consisting of n characters. The i-th character of s is chosen as follow... | instruction | 0 | 107,217 | 0 | 214,434 |
Tags: 2-sat, brute force, constructive algorithms, greedy
Correct Solution:
```
#------------------------template--------------------------#
import os
import sys
from math import *
from collections import *
from fractions import *
from bisect import *
from heapq import*
from io import BytesIO, IOBase
def vsInput():
... | output | 1 | 107,217 | 0 | 214,435 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider the following process. You have a binary string (a string where each character is either 0 or 1) w of length n and an integer x. You build a new binary string s consisting of n characters. The i-th character of s is chosen as follow... | instruction | 0 | 107,218 | 0 | 214,436 |
Tags: 2-sat, brute force, constructive algorithms, greedy
Correct Solution:
```
t = int(input())
for i in range(t):
s = input()
m = len(s)
x = int(input())
ANS = [1] * m
for i in range(m):
if s[i] == "0":
if i-x >= 0:
ANS[i-x] = 0
if i+x < m:
... | output | 1 | 107,218 | 0 | 214,437 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider the following process. You have a binary string (a string where each character is either 0 or 1) w of length n and an integer x. You build a new binary string s consisting of n characters. The i-th character of s is chosen as follow... | instruction | 0 | 107,219 | 0 | 214,438 |
Tags: 2-sat, brute force, constructive algorithms, greedy
Correct Solution:
```
import sys;input=sys.stdin.readline
def process():
s = input().strip()
x, = map(int, input().split())
n = len(s)
t = [1] * n
for i in range(n):
if int(s[i]) == 0:
if i-x >= 0:
t[i-x] =... | output | 1 | 107,219 | 0 | 214,439 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider the following process. You have a binary string (a string where each character is either 0 or 1) w of length n and an integer x. You build a new binary string s consisting of n characters. The i-th character of s is chosen as follow... | instruction | 0 | 107,220 | 0 | 214,440 |
Tags: 2-sat, brute force, constructive algorithms, greedy
Correct Solution:
```
from sys import stdin
inp = lambda : stdin.readline().strip()
t = int(inp())
for _ in range(t):
s = inp()
x = int(inp())
w = ['1']*len(s)
for i in range(len(s)):
if s[i] == '0':
if i - x > -1:
... | output | 1 | 107,220 | 0 | 214,441 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider the following process. You have a binary string (a string where each character is either 0 or 1) w of length n and an integer x. You build a new binary string s consisting of n characters. The i-th character of s is chosen as follow... | instruction | 0 | 107,221 | 0 | 214,442 |
Tags: 2-sat, brute force, constructive algorithms, greedy
Correct Solution:
```
def get():
n=len(s)
w = [1] * n
for i in range(n):
if s[i] == 0:
if i - x >= 0: w[i - x] = 0
if i + x < n: w[i + x] = 0
for i in range(n):
if s[i]:
if i-x>=0 and w[i-x]==1:... | output | 1 | 107,221 | 0 | 214,443 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider the following process. You have a binary string (a string where each character is either 0 or 1) w of length n and an integer x. You build a new binary string s consisting of n characters. The i-th character of s is chosen as follow... | instruction | 0 | 107,222 | 0 | 214,444 |
Tags: 2-sat, brute force, constructive algorithms, greedy
Correct Solution:
```
def process(n, x):
l = [0 for i in range(len(n))]
for i in range(len(l)):
if i-x >= 0 and n[i-x] == 1: l[i] = 1
if i+x < len(l) and n[i+x] == 1: l[i] = 1
return l
for t in range(int(input())):
l = list(map(i... | output | 1 | 107,222 | 0 | 214,445 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider the following process. You have a binary string (a string where each character is either 0 or 1) w of length n and an integer x. You build a new binary string s consisting of n characters. The i-th character of s is chosen as follow... | instruction | 0 | 107,223 | 0 | 214,446 |
Tags: 2-sat, brute force, constructive algorithms, greedy
Correct Solution:
```
import sys
input = sys.stdin.readline
def const(S):
n=len(S)
ANS=["0"]*n
for i in range(n):
if i-x>=0 and S[i-x]=="1":
ANS[i]="1"
if i+x<n and S[i+x]=="1":
ANS[i]="1"
return "".join(... | output | 1 | 107,223 | 0 | 214,447 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Consider the following process. You have a binary string (a string where each character is either 0 or 1) w of length n and an integer x. You build a new binary string s consisting of n characters. The i-th character of s is chosen as follow... | instruction | 0 | 107,224 | 0 | 214,448 |
Tags: 2-sat, brute force, constructive algorithms, greedy
Correct Solution:
```
res = ''
for _ in range(int(input())):
s = input()
x = int(input())
ls = len(s)
a = ['1'] * ls
for i, k in enumerate(s):
if k == '0':
if i-x>=0: a[i-x] = '0'
if i + x < ls: a[i+x] = '0'
... | output | 1 | 107,224 | 0 | 214,449 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a binary string s of length n (a string of n cha... | instruction | 0 | 107,235 | 0 | 214,470 |
Tags: bitmasks, brute force, hashing, string suffix structures, strings, two pointers
Correct Solution:
```
from itertools import accumulate, chain
BITS = 20
for _ in range(int(input())):
n, k = map(int, input().split());s = input();antis = [1 - int(si) for si in s];antis_s = ''.join(map(str, antis));antis_sums = t... | output | 1 | 107,235 | 0 | 214,471 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a binary string s of length n (a string of n cha... | instruction | 0 | 107,236 | 0 | 214,472 |
Tags: bitmasks, brute force, hashing, string suffix structures, strings, two pointers
Correct Solution:
```
from collections import deque
T = int(input())
r = 1
maxdigit = 20
def fastfrac(a,b,M):
numb = pow(b,M-2,M)
return ((a%M)*(numb%M))%M
def getnum(k,s):
n = len(s)
dic = {}
pre... | output | 1 | 107,236 | 0 | 214,473 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a binary string s of length n (a string of n cha... | instruction | 0 | 107,237 | 0 | 214,474 |
Tags: bitmasks, brute force, hashing, string suffix structures, strings, two pointers
Correct Solution:
```
import sys
input = sys.stdin.readline
from collections import Counter
import math
t = int(input())
for _ in range(t):
n,m = list(map(int,input().split()))
k = min(32,m)
s = input().rstrip()... | output | 1 | 107,237 | 0 | 214,475 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a binary string s of length n (a string of n cha... | instruction | 0 | 107,238 | 0 | 214,476 |
Tags: bitmasks, brute force, hashing, string suffix structures, strings, two pointers
Correct Solution:
```
"""
#If FastIO not needed, use this and don't forget to strip
#import sys, math
#input = sys.stdin.readline
"""
import os
import sys
from io import BytesIO, IOBase
import heapq as h
from bisect import bisect_le... | output | 1 | 107,238 | 0 | 214,477 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a binary string s of length n (a string of n cha... | instruction | 0 | 107,239 | 0 | 214,478 |
Tags: bitmasks, brute force, hashing, string suffix structures, strings, two pointers
Correct Solution:
```
import sys
input = sys.stdin.readline
t = int(input())
outL = []
for _ in range(t):
n, k = map(int, input().split())
s = input().strip()
bad = set()
k2 = min(k, 20)
last = -1
curr = 0
... | output | 1 | 107,239 | 0 | 214,479 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a binary string s of length n (a string of n cha... | instruction | 0 | 107,240 | 0 | 214,480 |
Tags: bitmasks, brute force, hashing, string suffix structures, strings, two pointers
Correct Solution:
```
import sys
input = sys.stdin.readline
a = int(input())
for case in range(a):
n, k0 = [int(x) for x in input().split(' ')]
start_inds = set([i for i in range(n-k0+1)])
s = input()
k = min(20, k... | output | 1 | 107,240 | 0 | 214,481 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a binary string s of length n (a string of n cha... | instruction | 0 | 107,241 | 0 | 214,482 |
Tags: bitmasks, brute force, hashing, string suffix structures, strings, two pointers
Correct Solution:
```
import sys
input = sys.stdin.readline
t = int(input())
for case in range(t):
n, k0 = [int(x) for x in input().split(' ')]
starts = set([i for i in range(n - k0 + 1)])
s = input()
k = min(20, k0)... | output | 1 | 107,241 | 0 | 214,483 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a binary string s of length n (a string of n cha... | instruction | 0 | 107,242 | 0 | 214,484 |
Tags: bitmasks, brute force, hashing, string suffix structures, strings, two pointers
Correct Solution:
```
# Author: yumtam
# Created at: 2020-12-30 16:53
def solve():
n, k = [int(t) for t in input().split()]
A = [int(c) for c in input()]
for i in range(n):
A[i] = 1 - A[i]
ctz = []
z... | output | 1 | 107,242 | 0 | 214,485 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a... | instruction | 0 | 107,243 | 0 | 214,486 |
Yes | output | 1 | 107,243 | 0 | 214,487 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a... | instruction | 0 | 107,244 | 0 | 214,488 |
Yes | output | 1 | 107,244 | 0 | 214,489 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a... | instruction | 0 | 107,245 | 0 | 214,490 |
Yes | output | 1 | 107,245 | 0 | 214,491 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a... | instruction | 0 | 107,246 | 0 | 214,492 |
Yes | output | 1 | 107,246 | 0 | 214,493 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a... | instruction | 0 | 107,247 | 0 | 214,494 |
No | output | 1 | 107,247 | 0 | 214,495 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a... | instruction | 0 | 107,248 | 0 | 214,496 |
No | output | 1 | 107,248 | 0 | 214,497 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a... | instruction | 0 | 107,249 | 0 | 214,498 |
No | output | 1 | 107,249 | 0 | 214,499 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call two strings a and b (both of length k) a bit similar if they have the same character in some position, i. e. there exists at least one i ∈ [1, k] such that a_i = b_i.
You are given a... | instruction | 0 | 107,250 | 0 | 214,500 |
No | output | 1 | 107,250 | 0 | 214,501 |
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 | 107,306 | 0 | 214,612 |
Tags: greedy
Correct Solution:
```
#!/usr/bin/python3
n, k = map(int, input().split())
if n < k:
print(-1)
exit(0)
if k == 1 and n == 1:
print("a")
exit(0)
if k == 1:
print(-1)
exit(0)
ans = []
b = 0
for i in range(n):
if i + k - 2 >= n:
ans.append(chr(ord('a') + k - (n - i)))
... | output | 1 | 107,306 | 0 | 214,613 |
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 | 107,307 | 0 | 214,614 |
Tags: greedy
Correct Solution:
```
a=list(map(int,input().split()))
if(a[0]>1)&(a[1]==1):print(-1)
elif a[0]==a[1]==1:print('a')
elif a[1]>a[0]:print(-1)
else:print('ab'*((a[0]+2-a[1])//2)+'a'*((a[0]-a[1])%2)+''.join(map(lambda x:chr(ord('c')+x),range(a[1]-2))))
``` | output | 1 | 107,307 | 0 | 214,615 |
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 | 107,309 | 0 | 214,618 |
Tags: greedy
Correct Solution:
```
X = list(map(int, input().split()))
Temp = "".join([chr(ord("a") + i) for i in range(X[1])])
if X[1] == 1 and X[0] == 1:
print("a")
elif X[1] > X[0] or X[1] == 1:
print(-1)
else:
print("ab" * ((X[0] - X[1] + 2) // 2) + "a" * ((X[0] - X[1] + 2) % 2) + Temp[2:])
# Hope the ... | output | 1 | 107,309 | 0 | 214,619 |
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 | 107,311 | 0 | 214,622 |
Tags: greedy
Correct Solution:
```
def fastio():
import sys
from io import StringIO
from atexit import register
global input
sys.stdin = StringIO(sys.stdin.read())
input = lambda : sys.stdin.readline().rstrip('\r\n')
sys.stdout = StringIO()
register(lambda : sys.__stdout__.write(sys.stdout.getvalue()))
fastio(... | output | 1 | 107,311 | 0 | 214,623 |
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 | 107,313 | 0 | 214,626 |
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 | 107,313 | 0 | 214,627 |
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 | 107,314 | 0 | 214,628 |
Yes | output | 1 | 107,314 | 0 | 214,629 |
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 | 107,315 | 0 | 214,630 |
Yes | output | 1 | 107,315 | 0 | 214,631 |
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 | 107,316 | 0 | 214,632 |
Yes | output | 1 | 107,316 | 0 | 214,633 |
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 | 107,317 | 0 | 214,634 |
Yes | output | 1 | 107,317 | 0 | 214,635 |
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 | 107,318 | 0 | 214,636 |
No | output | 1 | 107,318 | 0 | 214,637 |
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