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Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characters of these strings are distinct. Find any bea...
instruction
0
2,027
0
4,054
Tags: implementation, strings Correct Solution: ``` k = int(input()) s = input() ans = [] cur = "" se = set() for i in range(len(s)): if s[i] not in se: if len(cur) > 0: ans.append(cur) cur = "" cur = s[i] se.add(s[i]) else: cur += s[i] if cur: ans.append...
output
1
2,027
0
4,055
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characters of these strings are distinct. Find any bea...
instruction
0
2,028
0
4,056
Tags: implementation, strings Correct Solution: ``` # 544A # O(|q|) time # O(|q|) space __author__ = 'artyom' # SOLUTION def main(): b = [False] * 26 n = read() s = read(0) if n == 1: return ['YES', s] tokens = ['YES'] token = '' i = 1 p = 0 for c in s: if not b[o...
output
1
2,028
0
4,057
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a string q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characters of these strings are distinct. Find any bea...
instruction
0
2,029
0
4,058
Tags: implementation, strings Correct Solution: ``` import sys import math import bisect def solve(s, k): d = dict() for i in range(len(s)): if s[i] not in d: d[s[i]] = i A = list(d.values()) #print('s: %s, k: %d, A: %s' % (s, k, A)) if len(A) < k: return None B = []...
output
1
2,029
0
4,059
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 q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characte...
instruction
0
2,030
0
4,060
Yes
output
1
2,030
0
4,061
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 q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characte...
instruction
0
2,031
0
4,062
Yes
output
1
2,031
0
4,063
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 q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characte...
instruction
0
2,032
0
4,064
Yes
output
1
2,032
0
4,065
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 q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characte...
instruction
0
2,033
0
4,066
Yes
output
1
2,033
0
4,067
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 q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characte...
instruction
0
2,034
0
4,068
No
output
1
2,034
0
4,069
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 q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characte...
instruction
0
2,035
0
4,070
No
output
1
2,035
0
4,071
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 q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characte...
instruction
0
2,036
0
4,072
No
output
1
2,036
0
4,073
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 q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is string q (formally, s1 + s2 + ... + sk = q) and the first characte...
instruction
0
2,037
0
4,074
No
output
1
2,037
0
4,075
Provide tags and a correct Python 3 solution for this coding contest problem. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring ".." (two consecutive periods) in string s, of a...
instruction
0
2,038
0
4,076
Tags: constructive algorithms, data structures, implementation Correct Solution: ``` (n, m) = (int(t) for t in input().split()) s = [c for c in input()] fs = 0 for i in range(1, len(s)): if s[i] == '.' and s[i - 1] == '.': fs += 1 out = [] for k in range(m): t = input().split() i = int(t[0]) - 1 ...
output
1
2,038
0
4,077
Provide tags and a correct Python 3 solution for this coding contest problem. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring ".." (two consecutive periods) in string s, of a...
instruction
0
2,039
0
4,078
Tags: constructive algorithms, data structures, implementation Correct Solution: ``` import math,sys,bisect,heapq from collections import defaultdict,Counter,deque from itertools import groupby,accumulate from functools import lru_cache from heapq import heapify,heappop,heappush #sys.setrecursionlimit(200000000) int1 =...
output
1
2,039
0
4,079
Provide tags and a correct Python 3 solution for this coding contest problem. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring ".." (two consecutive periods) in string s, of a...
instruction
0
2,040
0
4,080
Tags: constructive algorithms, data structures, implementation Correct Solution: ``` def solve(string, updates): count = sum(string) - sum([not string[i] and string[i + 1] for i in range(len(string) - 1)]) for (pos, val) in updates: if string[pos] != val: sign ...
output
1
2,040
0
4,081
Provide tags and a correct Python 3 solution for this coding contest problem. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring ".." (two consecutive periods) in string s, of a...
instruction
0
2,041
0
4,082
Tags: constructive algorithms, data structures, implementation Correct Solution: ``` n, m = map(int, input().split()) a = list(input()) res=0 b = [] for i in range(1, n): if a[i]+a[i-1] =='..': res += 1 for i in range(m): g, c = input().split() p = int(g)-1 if p > 0 and a[p-1] + a[p] == '..': ...
output
1
2,041
0
4,083
Provide tags and a correct Python 3 solution for this coding contest problem. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring ".." (two consecutive periods) in string s, of a...
instruction
0
2,042
0
4,084
Tags: constructive algorithms, data structures, implementation Correct Solution: ``` import sys n, m = map(int, sys.stdin.readline().split()) s = input() left = 0 right = 0 ans = 0 while True: left = s.find('.', right) if left < 0: break right = left+1 while right < n and s[right] == '.': ...
output
1
2,042
0
4,085
Provide tags and a correct Python 3 solution for this coding contest problem. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring ".." (two consecutive periods) in string s, of a...
instruction
0
2,043
0
4,086
Tags: constructive algorithms, data structures, implementation Correct Solution: ``` n, m = map(int, input().split()) s = [c != '.' for c in input()] + [1] k = sum(s[i] == s[i + 1] == 0 for i in range(n - 1)) t = [0] * m for i in range(m): x, c = input().split() x, c = int(x) - 1, c != '.' if not s[x]: ...
output
1
2,043
0
4,087
Provide tags and a correct Python 3 solution for this coding contest problem. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring ".." (two consecutive periods) in string s, of a...
instruction
0
2,044
0
4,088
Tags: constructive algorithms, data structures, implementation Correct Solution: ``` from sys import stdin input = stdin.readline n,m = map(int,input().split()) s = list((0,1)[c == '.'] for c in list(input())) res = 0 cnt = 0 for k in s: if k == 1: cnt += 1 else: res += max(cnt-1,0) cnt = 0 res += max(0,cnt-1...
output
1
2,044
0
4,089
Provide tags and a correct Python 3 solution for this coding contest problem. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring ".." (two consecutive periods) in string s, of a...
instruction
0
2,045
0
4,090
Tags: constructive algorithms, data structures, implementation Correct Solution: ``` from sys import stdin,stdout input = stdin.readline import operator from array import array n,m = map(int,input().split()) def calc(): s = array('B',[0]) s.extend(c == '.' for c in input()) res = sum(map(operator.mul,s[1:...
output
1
2,045
0
4,091
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring "...
instruction
0
2,046
0
4,092
Yes
output
1
2,046
0
4,093
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring "...
instruction
0
2,047
0
4,094
Yes
output
1
2,047
0
4,095
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring "...
instruction
0
2,048
0
4,096
Yes
output
1
2,048
0
4,097
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring "...
instruction
0
2,049
0
4,098
Yes
output
1
2,049
0
4,099
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring "...
instruction
0
2,050
0
4,100
No
output
1
2,050
0
4,101
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring "...
instruction
0
2,051
0
4,102
No
output
1
2,051
0
4,103
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring "...
instruction
0
2,052
0
4,104
No
output
1
2,052
0
4,105
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Daniel has a string s, consisting of lowercase English letters and period signs (characters '.'). Let's define the operation of replacement as the following sequence of steps: find a substring "...
instruction
0
2,053
0
4,106
No
output
1
2,053
0
4,107
Provide a correct Python 3 solution for this coding contest problem. You are a treasure hunter traveling around the world. Finally, you’ve got an ancient text indicating the place where the treasure was hidden. The ancient text looks like a meaningless string of characters at first glance. Actually, the secret place i...
instruction
0
2,417
0
4,834
"Correct Solution: ``` def lcs(x, y, pre_lcs, pre_lcs_len): pm = dict((zip('ABCDEFGHIJKLMNOPQRSTUVWXYZ', [0] * 26))) for c in pm: for i, xc in enumerate(x): if c == xc: pm[c] |= (1 << i) V = (1 << len(x)) - 1 rec = [] for yc in y: V = ((V + (V & ...
output
1
2,417
0
4,835
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are a treasure hunter traveling around the world. Finally, you’ve got an ancient text indicating the place where the treasure was hidden. The ancient text looks like a meaningless string of ...
instruction
0
2,418
0
4,836
No
output
1
2,418
0
4,837
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are a treasure hunter traveling around the world. Finally, you’ve got an ancient text indicating the place where the treasure was hidden. The ancient text looks like a meaningless string of ...
instruction
0
2,419
0
4,838
No
output
1
2,419
0
4,839
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are a treasure hunter traveling around the world. Finally, you’ve got an ancient text indicating the place where the treasure was hidden. The ancient text looks like a meaningless string of ...
instruction
0
2,420
0
4,840
No
output
1
2,420
0
4,841
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are a treasure hunter traveling around the world. Finally, you’ve got an ancient text indicating the place where the treasure was hidden. The ancient text looks like a meaningless string of ...
instruction
0
2,421
0
4,842
No
output
1
2,421
0
4,843
Provide a correct Python 3 solution for this coding contest problem. Problem Taro has N character strings, each of which is L in length. Taro loves palindromes, so I want to make palindromes as long as possible by selecting some of the N character strings and arranging them in any order. Find the longest palindrome ...
instruction
0
2,433
0
4,866
"Correct Solution: ``` from functools import cmp_to_key n, l = map(int, input().split()) ss = {} for i in range(n): s = input() ss[s] = ss.get(s, 0) + 1 ans = "" ma = "" for s in sorted(ss): if s[::-1] == s: ans += s * (ss[s]//2) ss[s] -= 2*(ss[s]//2) if ss[s] > 0 and len(ma) < len(s...
output
1
2,433
0
4,867
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Let's denote (yet again) the sequence of Fibonacci strings: F(0) = 0, F(1) = 1, F(i) = F(i - 2) + F(i - 1), where the plus sign denotes the concatenation of two strings. Let's denote the lex...
instruction
0
2,483
0
4,966
No
output
1
2,483
0
4,967
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Let's denote (yet again) the sequence of Fibonacci strings: F(0) = 0, F(1) = 1, F(i) = F(i - 2) + F(i - 1), where the plus sign denotes the concatenation of two strings. Let's denote the lex...
instruction
0
2,484
0
4,968
No
output
1
2,484
0
4,969
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Let's denote (yet again) the sequence of Fibonacci strings: F(0) = 0, F(1) = 1, F(i) = F(i - 2) + F(i - 1), where the plus sign denotes the concatenation of two strings. Let's denote the lex...
instruction
0
2,485
0
4,970
No
output
1
2,485
0
4,971
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Let's denote (yet again) the sequence of Fibonacci strings: F(0) = 0, F(1) = 1, F(i) = F(i - 2) + F(i - 1), where the plus sign denotes the concatenation of two strings. Let's denote the lex...
instruction
0
2,486
0
4,972
No
output
1
2,486
0
4,973
Provide tags and a correct Python 3 solution for this coding contest problem. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some consecutive substring of equal characters, erase it ...
instruction
0
2,487
0
4,974
Tags: dp Correct Solution: ``` from sys import stdin uu=0 n=int(stdin.readline().strip()) s1=stdin.readline().strip() s=list(map(int,stdin.readline().strip().split())) dp=[-1 for i in range(n+1)] def sol1(x): if dp[x]!=-1: return dp[x] if x==0: return 0 ans=0 for i in range(x): a...
output
1
2,487
0
4,975
Provide tags and a correct Python 3 solution for this coding contest problem. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some consecutive substring of equal characters, erase it ...
instruction
0
2,488
0
4,976
Tags: dp Correct Solution: ``` # returns answer to the subproblem with interval range [start, end], # but with a total of "extra" additional stuff on the end # that must be deleted last. memo = {} def f(dat, rewards, start, end, extra): curr = (start, end, extra) if curr in memo: return memo[curr] ...
output
1
2,488
0
4,977
Provide tags and a correct Python 3 solution for this coding contest problem. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some consecutive substring of equal characters, erase it ...
instruction
0
2,489
0
4,978
Tags: dp Correct Solution: ``` n = int(input()) s = input() a = [int(x) for x in input().split()] dp = [[[False for i in range(101)] for j in range(101)] for k in range(101)] def f(i, j, k): if not dp[i][j][k]: if i == j: dp[i][j][k] = 0 else: dp[i][j][k] = f(i+1, j, 0) + a...
output
1
2,489
0
4,979
Provide tags and a correct Python 3 solution for this coding contest problem. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some consecutive substring of equal characters, erase it ...
instruction
0
2,490
0
4,980
Tags: dp Correct Solution: ``` import sys sys.setrecursionlimit(10 ** 6) n = int(input()) s = input().strip() a = [0] + list(map(int, input().split())) MX = 105 dp = [0] * (MX ** 3) def f(i, j, k): if i == j: return 0 idx = i * MX * MX + j * MX + k if not dp[idx]: dp[idx] = f(i + 1, j, 1) + a[k] ...
output
1
2,490
0
4,981
Provide tags and a correct Python 3 solution for this coding contest problem. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some consecutive substring of equal characters, erase it ...
instruction
0
2,491
0
4,982
Tags: dp Correct Solution: ``` n = int(input()) s = input() ai = [0] + list(map(int,input().split())) ar = [ai[i] for i in range(n+1)] for i in range(1,n): num = 0 for j in range(0,(i+1) // 2 + 1): ar[i] = max(ar[i],ar[j] + ar[i-j]) ar2 = [] num = 1 for i in range(1,n): if s[i] == s[i-1]: ...
output
1
2,491
0
4,983
Provide tags and a correct Python 3 solution for this coding contest problem. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some consecutive substring of equal characters, erase it ...
instruction
0
2,492
0
4,984
Tags: dp Correct Solution: ``` # 545 ms from functools import lru_cache n = int(input()) s = input() A = [0] + list(map(int, input().split())) dp = [0] * (n + 1) for i in range(1, n + 1): dp[i] = max(dp[j] + A[i - j] for j in range(0, i)) @lru_cache(None) def score(s): length = len(s) if length == 0: ...
output
1
2,492
0
4,985
Provide tags and a correct Python 3 solution for this coding contest problem. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some consecutive substring of equal characters, erase it ...
instruction
0
2,493
0
4,986
Tags: dp Correct Solution: ``` import sys from math import * from fractions import gcd readints=lambda:map(int, input().strip('\n').split()) n=int(input()) s=input() a=list(readints()) a=[0]+a #1-index cache={} def solve(i,j,k): if i>j: return 0 if i==j: return a[k] if (i,j,k) in cache: return cache[(i,j...
output
1
2,493
0
4,987
Provide tags and a correct Python 3 solution for this coding contest problem. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some consecutive substring of equal characters, erase it ...
instruction
0
2,494
0
4,988
Tags: dp Correct Solution: ``` from functools import lru_cache n = int(input()) s = input() A = [0] + list(map(int, input().split())) dp = [0] * (n + 1) for i in range(1, n + 1): dp[i] = max(dp[j] + A[i - j] for j in range(0, i)) res = {} @lru_cache(None) def score(s): length = len(s) if length == 0: ...
output
1
2,494
0
4,989
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some conse...
instruction
0
2,495
0
4,990
Yes
output
1
2,495
0
4,991
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some conse...
instruction
0
2,496
0
4,992
Yes
output
1
2,496
0
4,993
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some conse...
instruction
0
2,497
0
4,994
Yes
output
1
2,497
0
4,995
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some conse...
instruction
0
2,498
0
4,996
Yes
output
1
2,498
0
4,997
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Vasya has a string s of length n consisting only of digits 0 and 1. Also he has an array a of length n. Vasya performs the following operation until the string becomes empty: choose some conse...
instruction
0
2,499
0
4,998
No
output
1
2,499
0
4,999