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.
You are given a string s, consisting of small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out if it is possible to rearrange characters in str... | instruction | 0 | 89,358 | 0 | 178,716 |
Tags: implementation, number theory, strings
Correct Solution:
```
import sys
from functools import lru_cache, cmp_to_key
from heapq import merge, heapify, heappop, heappush
# from math import *
from collections import defaultdict as dd, deque, Counter as C
from itertools import combinations as comb, permutations as pe... | output | 1 | 89,358 | 0 | 178,717 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a string s, consisting of small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out if it is possible to rearrange characters in str... | instruction | 0 | 89,359 | 0 | 178,718 |
Tags: implementation, number theory, strings
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():
sys.stdin = ... | output | 1 | 89,359 | 0 | 178,719 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a string s, consisting of small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out if it is possible to rearrange characters in str... | instruction | 0 | 89,360 | 0 | 178,720 |
Tags: implementation, number theory, strings
Correct Solution:
```
#!/usr/bin/python3
s = input()
d = dict()
for c in s:
if c not in d:
d[c] = 0
d[c] += 1
cnto = 1
isprime = [True] * (len(s) + 1)
for p in range(2, len(s) + 1):
if isprime[p]:
for i in range(p * p, len(s) + 1, p):
... | output | 1 | 89,360 | 0 | 178,721 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a string s, consisting of small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out if it is possible to rearrange characters in str... | instruction | 0 | 89,361 | 0 | 178,722 |
Tags: implementation, number theory, strings
Correct Solution:
```
from collections import Counter
def is_prime(x):
if x < 2:
return 0
for i in range(2, x):
if x % i == 0:
return False
return True
def proc(s):
n = len(s)
same = set()
for p in range(2,n+1):
i... | output | 1 | 89,361 | 0 | 178,723 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a string s, consisting of small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out if it is possible to rearrange characters in str... | instruction | 0 | 89,362 | 0 | 178,724 |
Tags: implementation, number theory, strings
Correct Solution:
```
import math
ch='abcdefghijklmnopqrstuvwxyz'
def sieve(n):
p = 2
while (p * p <= n):
if (prime[p] == True):
for i in range(p * 2, n + 1, p):
prime[i] = False
p += 1
prime[0]= False
prime[1]=... | output | 1 | 89,362 | 0 | 178,725 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a string s, consisting of small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out if it is possible to rearrange characters in str... | instruction | 0 | 89,363 | 0 | 178,726 |
Tags: implementation, number theory, strings
Correct Solution:
```
S = input()
s = []
d = {}
n = 0
for i in S:
if ord('a') <= ord(i) <= ord('z'):
n += 1
if i in d:
d[i] += 1
else:
d[i] = 1
primes = []
for i in range(max(3,n // 2 + 1), n+1):
j = 2
f = 0
wh... | output | 1 | 89,363 | 0 | 178,727 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a string s, consisting of small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out if it is possible to rearrange characters in str... | instruction | 0 | 89,364 | 0 | 178,728 |
Tags: implementation, number theory, strings
Correct Solution:
```
def prime(a):
i = 2
while i * i <= a:
if a % i == 0:
return False
i += 1
return True
tab = list(input())
letter_count = {}
for letter in tab:
if letter in letter_count:
letter_count[letter] += 1
... | output | 1 | 89,364 | 0 | 178,729 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a string s, consisting of small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out if it is possible to rearrange characters in str... | instruction | 0 | 89,365 | 0 | 178,730 |
Tags: implementation, number theory, strings
Correct Solution:
```
from collections import Counter
d, t = 'NO', input()
c, n = Counter(t), len(t)
p = [0] * (n + 1)
for i in range(2, n // 2 + 1):
if 1 - p[i]: p[i::i] = [1] * (n // i)
s = sum(p)
u = v = ''
for q, k in c.items():
if v or k < s:
u += q * k... | output | 1 | 89,365 | 0 | 178,731 |
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 small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out i... | instruction | 0 | 89,366 | 0 | 178,732 |
Yes | output | 1 | 89,366 | 0 | 178,733 |
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 small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out i... | instruction | 0 | 89,367 | 0 | 178,734 |
Yes | output | 1 | 89,367 | 0 | 178,735 |
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 small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out i... | instruction | 0 | 89,368 | 0 | 178,736 |
Yes | output | 1 | 89,368 | 0 | 178,737 |
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 small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out i... | instruction | 0 | 89,369 | 0 | 178,738 |
Yes | output | 1 | 89,369 | 0 | 178,739 |
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 small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out i... | instruction | 0 | 89,370 | 0 | 178,740 |
No | output | 1 | 89,370 | 0 | 178,741 |
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 small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out i... | instruction | 0 | 89,371 | 0 | 178,742 |
No | output | 1 | 89,371 | 0 | 178,743 |
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 small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out i... | instruction | 0 | 89,372 | 0 | 178,744 |
No | output | 1 | 89,372 | 0 | 178,745 |
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 small Latin letters. Let's denote the length of the string as |s|. The characters in the string are numbered starting from 1.
Your task is to find out i... | instruction | 0 | 89,373 | 0 | 178,746 |
No | output | 1 | 89,373 | 0 | 178,747 |
Provide tags and a correct Python 3 solution for this coding contest problem.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequence {x, y}.
In these problem you are given fou... | instruction | 0 | 89,741 | 0 | 179,482 |
Tags: constructive algorithms, greedy, implementation, math
Correct Solution:
```
from collections import defaultdict
import sys, os, math
if __name__ == "__main__":
#n, m = list(map(int, input().split()))
a00, a01, a10, a11 = map(int, input().split())
x, y = int((1 + math.sqrt(1 + 8 * a11)) // 2), int((1... | output | 1 | 89,741 | 0 | 179,483 |
Provide tags and a correct Python 3 solution for this coding contest problem.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequence {x, y}.
In these problem you are given fou... | instruction | 0 | 89,742 | 0 | 179,484 |
Tags: constructive algorithms, greedy, implementation, math
Correct Solution:
```
a00, a01, a10, a11 = map(int, input().split())
numZeros = 0
numOnes = 0
ans = True
for n0 in range(1, 2*a00 + 1):
if n0 * (n0 - 1) == 2 * a00:
numZeros = n0
break
elif n0 * (n0 - 1) > 2 * a00:
ans = False
... | output | 1 | 89,742 | 0 | 179,485 |
Provide tags and a correct Python 3 solution for this coding contest problem.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequence {x, y}.
In these problem you are given fou... | instruction | 0 | 89,743 | 0 | 179,486 |
Tags: constructive algorithms, greedy, implementation, math
Correct Solution:
```
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Mon Jun 1 15:32:44 2020
@author: shailesh
"""
import math
a00,a01,a10,a11 = [int(i) for i in input().split()]
#l = sorted([a00,a01,a10,a11])
done = 0
if a00==0 and a11 ... | output | 1 | 89,743 | 0 | 179,487 |
Provide tags and a correct Python 3 solution for this coding contest problem.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequence {x, y}.
In these problem you are given fou... | instruction | 0 | 89,744 | 0 | 179,488 |
Tags: constructive algorithms, greedy, implementation, math
Correct Solution:
```
#!/usr/bin/env python3.5
import sys
import math
def read_data():
return tuple(map(int, next(sys.stdin).split()))
def reverse_count(k):
d = math.sqrt(1 + 8*k)
n = int((1+d)/2 + .5)
if n*(n-1) == 2*k:
return n
... | output | 1 | 89,744 | 0 | 179,489 |
Provide tags and a correct Python 3 solution for this coding contest problem.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequence {x, y}.
In these problem you are given fou... | instruction | 0 | 89,745 | 0 | 179,490 |
Tags: constructive algorithms, greedy, implementation, math
Correct Solution:
```
from math import *
from sys import *
def calc(f):
return int((1+sqrt(8*f+1))//2)
a,b,c,d=(int(z) for z in input().split())
if a==d==0 and b==1 and c==0:
print("01")
exit(0)
if a==d==0 and b==0 and c==1:
print("10")
exit(0)
if ... | output | 1 | 89,745 | 0 | 179,491 |
Provide tags and a correct Python 3 solution for this coding contest problem.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequence {x, y}.
In these problem you are given fou... | instruction | 0 | 89,746 | 0 | 179,492 |
Tags: constructive algorithms, greedy, implementation, math
Correct Solution:
```
import sys
import math
def check():
n = 1000000
for i in range(n):
if is_square(1+8*i):
print(i)
def is_square(integer):
root = math.sqrt(integer)
if int(root + 0.5) ** 2 == integer:
re... | output | 1 | 89,746 | 0 | 179,493 |
Provide tags and a correct Python 3 solution for this coding contest problem.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequence {x, y}.
In these problem you are given fou... | instruction | 0 | 89,747 | 0 | 179,494 |
Tags: constructive algorithms, greedy, implementation, math
Correct Solution:
```
def impossible():
print("Impossible")
exit()
def good(ones, zeros):
return ones * zeros == a01 + a10
a00, a01, a10, a11 = map(int, input().split())
if int(round((a00 * 8 + 1) ** 0.5)) ** 2 != a00 * 8 + 1:
impossible()... | output | 1 | 89,747 | 0 | 179,495 |
Provide tags and a correct Python 3 solution for this coding contest problem.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequence {x, y}.
In these problem you are given fou... | instruction | 0 | 89,748 | 0 | 179,496 |
Tags: constructive algorithms, greedy, implementation, math
Correct Solution:
```
def F(s):
x00 = x01 = x10 = x11 = 0
for i in range(len(s)):
for j in range(i + 1, len(s)):
cur = s[i] + s[j]
if cur == '00': x00 += 1
if cur == '01': x01 += 1
if cur == '10':... | output | 1 | 89,748 | 0 | 179,497 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequen... | instruction | 0 | 89,751 | 0 | 179,502 |
No | output | 1 | 89,751 | 0 | 179,503 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequen... | instruction | 0 | 89,752 | 0 | 179,504 |
No | output | 1 | 89,752 | 0 | 179,505 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For each string s consisting of characters '0' and '1' one can define four integers a00, a01, a10 and a11, where axy is the number of subsequences of length 2 of the string s equal to the sequen... | instruction | 0 | 89,754 | 0 | 179,508 |
No | output | 1 | 89,754 | 0 | 179,509 |
Provide tags and a correct Python 3 solution for this coding contest problem.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to go to her castle. Taro's response to her was a... | instruction | 0 | 89,789 | 0 | 179,578 |
Tags: data structures, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
S=str(input())
n=int(input())
b=str(input())
M=[b]
m=11
for i in range(n-1):
f=0
b=str(input())
for i in range(len(M)):
if len(M[i])>=len(b):
M=M[:i]+[b]+M[i:]
f=1
break
if... | output | 1 | 89,789 | 0 | 179,579 |
Provide tags and a correct Python 3 solution for this coding contest problem.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to go to her castle. Taro's response to her was a... | instruction | 0 | 89,790 | 0 | 179,580 |
Tags: data structures, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
S=str(input())
n=int(input())
b=str(input())
M=[b]
m=11
for i in range(n-1):
f=0
b=str(input())
for i in range(len(M)):
if len(M[i])>=len(b):
M=M[:i]+[b]+M[i:]
f=1
... | output | 1 | 89,790 | 0 | 179,581 |
Provide tags and a correct Python 3 solution for this coding contest problem.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to go to her castle. Taro's response to her was a... | instruction | 0 | 89,791 | 0 | 179,582 |
Tags: data structures, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
import os
import sys
from io import BytesIO, IOBase
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in ... | output | 1 | 89,791 | 0 | 179,583 |
Provide tags and a correct Python 3 solution for this coding contest problem.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to go to her castle. Taro's response to her was a... | instruction | 0 | 89,792 | 0 | 179,584 |
Tags: data structures, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
# import functools
#
#
# class Automaton:
# def __init__(self, start, ends, transitions):
# self.start = start
# self.ends = set(ends)
# self.transitions = transitions # [dict]
#
# def next_states(se... | output | 1 | 89,792 | 0 | 179,585 |
Provide tags and a correct Python 3 solution for this coding contest problem.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to go to her castle. Taro's response to her was a... | instruction | 0 | 89,793 | 0 | 179,586 |
Tags: data structures, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
s = input()
n = int(input())
b = []
for i in range(n):
b.append(input())
s_original = s
s_dict = {s: 1}
for bi in b:
while True:
new_s_dict = {}
for s in s_dict.keys():
part_list = s.split(bi)
... | output | 1 | 89,793 | 0 | 179,587 |
Provide tags and a correct Python 3 solution for this coding contest problem.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to go to her castle. Taro's response to her was a... | instruction | 0 | 89,794 | 0 | 179,588 |
Tags: data structures, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
#On récupère les données
chaine = input()
n = int(input())
all_borings = sorted([input() for _ in range(n)], key=lambda s : len(s))
#On traite un cas particulier à priori pb
chaine_uniforme = True;
first = chaine[0]
for c in chaine... | output | 1 | 89,794 | 0 | 179,589 |
Provide tags and a correct Python 3 solution for this coding contest problem.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to go to her castle. Taro's response to her was a... | instruction | 0 | 89,795 | 0 | 179,590 |
Tags: data structures, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
s, n = input(), int(input())
t = [input() for i in range(n)]
def f(i):
global t
for j in range(n):
if i < j:
if len(t[j]) < len(t[i]) and t[j] in t[i]: return False
elif j < i and t[j] in t[i]: r... | output | 1 | 89,795 | 0 | 179,591 |
Provide tags and a correct Python 3 solution for this coding contest problem.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to go to her castle. Taro's response to her was a... | instruction | 0 | 89,796 | 0 | 179,592 |
Tags: data structures, dp, greedy, hashing, strings, two pointers
Correct Solution:
```
R = lambda : map(int, input().split())
s = input()
n = int(input())
words = [input() for i in range(n)]
dp = [-1] * len(s)
for w in words:
si = 0
while si != -1:
si = s.find(w, si)
if si >= 0:
dp[... | output | 1 | 89,796 | 0 | 179,593 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to... | instruction | 0 | 89,797 | 0 | 179,594 |
Yes | output | 1 | 89,797 | 0 | 179,595 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to... | instruction | 0 | 89,798 | 0 | 179,596 |
No | output | 1 | 89,798 | 0 | 179,597 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to... | instruction | 0 | 89,799 | 0 | 179,598 |
No | output | 1 | 89,799 | 0 | 179,599 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to... | instruction | 0 | 89,800 | 0 | 179,600 |
No | output | 1 | 89,800 | 0 | 179,601 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
After Fox Ciel got off a bus, she found that the bus she was on was a wrong bus and she lost her way in a strange town. However, she fortunately met her friend Beaver Taro and asked which way to... | instruction | 0 | 89,801 | 0 | 179,602 |
No | output | 1 | 89,801 | 0 | 179,603 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a positive even number N.
Find the number of strings s of length N consisting of `A`, `B`, and `C` that satisfy the following condition:
* s can be converted to the empty string by repeating the following operation:
* Choose two consecutiv... | instruction | 0 | 89,897 | 0 | 179,794 |
"Correct Solution:
```
LARGE = 998244353
def solve(n):
r = 0
mck = 1
factorial_n = 1
factorial_inv = [0] * (n + 1)
factorial_inv[0] = 1
for i in range(1, n + 1):
factorial_n *= i
factorial_n %= LARGE
factorial_inv[-1] = pow(factorial_n, LARGE - 2, LARGE)
for i in range(... | output | 1 | 89,897 | 0 | 179,795 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a positive even number N.
Find the number of strings s of length N consisting of `A`, `B`, and `C` that satisfy the following condition:
* s can be converted to the empty string by repeating the following operation:
* Choose two consecutiv... | instruction | 0 | 89,898 | 0 | 179,796 |
"Correct Solution:
```
N = int(input())
nn = N + 10
P = 998244353
fa = [1] * (nn+1)
fainv = [1] * (nn+1)
for i in range(nn):
fa[i+1] = fa[i] * (i+1) % P
fainv[-1] = pow(fa[-1], P-2, P)
for i in range(nn)[::-1]:
fainv[i] = fainv[i+1] * (i+1) % P
C = lambda a, b: fa[a] * fainv[b] % P * fainv[a-b] % P if 0 <= b ... | output | 1 | 89,898 | 0 | 179,797 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a positive even number N.
Find the number of strings s of length N consisting of `A`, `B`, and `C` that satisfy the following condition:
* s can be converted to the empty string by repeating the following operation:
* Choose two consecutiv... | instruction | 0 | 89,899 | 0 | 179,798 |
"Correct Solution:
```
def calc(n, mod):
f = 1
fac = [1]
for i in range(1, n + 1):
f *= i
f %= mod
fac.append(f)
inv = pow(f, mod - 2, mod)
invs = [1] * (n + 1)
invs[n] = inv
for i in range(n, 1, -1):
inv *= i
inv %= mod
invs[i - 1] = inv
return fac, invs
def cnk(n, r, mod, fac, inv):
return fac[n... | output | 1 | 89,899 | 0 | 179,799 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a positive even number N.
Find the number of strings s of length N consisting of `A`, `B`, and `C` that satisfy the following condition:
* s can be converted to the empty string by repeating the following operation:
* Choose two consecutiv... | instruction | 0 | 89,900 | 0 | 179,800 |
"Correct Solution:
```
#C
def main():
mod=998244353
n=int(input())
Fact=[1] #階乗
for i in range(1,n+1):
Fact.append(Fact[i-1]*i%mod)
Finv=[0]*(n+1) #階乗の逆元
Finv[-1]=pow(Fact[-1],mod-2,mod)
for i in range(n-1,-1,-1):
Finv[i]=Finv[i+1]*(i+1)%mod
def comb(n,r):
if n<r:... | output | 1 | 89,900 | 0 | 179,801 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a positive even number N.
Find the number of strings s of length N consisting of `A`, `B`, and `C` that satisfy the following condition:
* s can be converted to the empty string by repeating the following operation:
* Choose two consecutiv... | instruction | 0 | 89,901 | 0 | 179,802 |
"Correct Solution:
```
N=int(input())
mod=998244353
FACT=[1]
for i in range(1,N+1):
FACT.append(FACT[-1]*i%mod)
FACT_INV=[pow(FACT[-1],mod-2,mod)]
for i in range(N,0,-1):
FACT_INV.append(FACT_INV[-1]*i%mod)
FACT_INV.reverse()
POW=[1]
for i in range(N):
POW.append(POW[-1]*2%mod)
def Combi(a,b):
retu... | output | 1 | 89,901 | 0 | 179,803 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a positive even number N.
Find the number of strings s of length N consisting of `A`, `B`, and `C` that satisfy the following condition:
* s can be converted to the empty string by repeating the following operation:
* Choose two consecutiv... | instruction | 0 | 89,902 | 0 | 179,804 |
"Correct Solution:
```
MOD = 998244353
N = int(input())
ans = pow(3, N, MOD)
def getInvs(n, MOD):
invs = [1] * (n+1)
for x in range(2, n+1):
invs[x] = (-(MOD//x) * invs[MOD%x]) % MOD
return invs
def getCombNs(n, invs, MOD):
combNs = [1] * (n//2+1)
for x in range(1, n//2+1):
combN... | output | 1 | 89,902 | 0 | 179,805 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a positive even number N.
Find the number of strings s of length N consisting of `A`, `B`, and `C` that satisfy the following condition:
* s can be converted to the empty string by repeating the following operation:
* Choose two consecutiv... | instruction | 0 | 89,903 | 0 | 179,806 |
"Correct Solution:
```
N = int(input())
nn = N + 10
P = 998244353
fa = [1] * (nn+1)
fainv = [1] * (nn+1)
for i in range(nn):
fa[i+1] = fa[i] * (i+1) % P
fainv[-1] = pow(fa[-1], P-2, P)
for i in range(nn)[::-1]:
fainv[i] = fainv[i+1] * (i+1) % P
C = lambda a, b: fa[a] * fainv[b] % P * fainv[a-b] % P if 0 <= b ... | output | 1 | 89,903 | 0 | 179,807 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a positive even number N.
Find the number of strings s of length N consisting of `A`, `B`, and `C` that satisfy the following condition:
* s can be converted to the empty string by repeating the following operation:
* Choose two consecutiv... | instruction | 0 | 89,904 | 0 | 179,808 |
"Correct Solution:
```
n=int(input())
pre=[1]*(n//2+200)
pp=[1]*(n+1)
mod=998244353
for i in range(1,n//2+100):
pre[i]=((pre[i-1]*2)%mod)
p=[1]*(n+1)
for i in range(n):
p[i+1]=((p[i]*(i+1))%mod)
pp[-1] = pow(p[-1], mod - 2, mod)
for i in range(2, n + 1):
pp[-i] = int((pp[-i + 1] * (n + 2 - i)) % mod)
t... | output | 1 | 89,904 | 0 | 179,809 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Given is a positive even number N.
Find the number of strings s of length N consisting of `A`, `B`, and `C` that satisfy the following condition:
* s can be converted to the empty string by re... | instruction | 0 | 89,905 | 0 | 179,810 |
Yes | output | 1 | 89,905 | 0 | 179,811 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Given is a positive even number N.
Find the number of strings s of length N consisting of `A`, `B`, and `C` that satisfy the following condition:
* s can be converted to the empty string by re... | instruction | 0 | 89,906 | 0 | 179,812 |
Yes | output | 1 | 89,906 | 0 | 179,813 |
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