message stringlengths 2 433k | message_type stringclasses 2
values | message_id int64 0 1 | conversation_id int64 113 108k | cluster float64 12 12 | __index_level_0__ int64 226 217k |
|---|---|---|---|---|---|
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p or in q).
Let's sort p in non-decreasing order,... | instruction | 0 | 48,108 | 12 | 96,216 |
Tags: combinatorics, math, sortings
Correct Solution:
```
import sys
from sys import stdin
def modfac(n, MOD):
f = 1
factorials = [1]
for m in range(1, n + 1):
f *= m
f %= MOD
factorials.append(f)
inv = pow(f, MOD - 2, MOD)
invs = [1] * (n + 1)
invs[n] = inv
for m... | output | 1 | 48,108 | 12 | 96,217 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p or in q).
Let's sort p in non-decreasing order,... | instruction | 0 | 48,109 | 12 | 96,218 |
Tags: combinatorics, math, sortings
Correct Solution:
```
# by the authority of GOD author: manhar singh sachdev #
import os,sys
from io import BytesIO, IOBase
mod = 998244353
fac = [1]
for i in range(1,300001):
fac.append((fac[-1]*i)%mod)
fac_in = [pow(fac[-1],mod-2,mod)]
for i in range(300000,0,-1):
fac... | output | 1 | 48,109 | 12 | 96,219 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p or in q).
Let's sort p in non-decreasing order,... | instruction | 0 | 48,110 | 12 | 96,220 |
Tags: combinatorics, math, sortings
Correct Solution:
```
from sys import stdin, gettrace
if gettrace():
inputi = input
else:
def input():
return next(stdin)[:-1]
def inputi():
return stdin.buffer.readline()
MOD = 998244353
def main():
n = int(inputi())
aa = [int(a) for a in in... | output | 1 | 48,110 | 12 | 96,221 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p o... | instruction | 0 | 48,111 | 12 | 96,222 |
Yes | output | 1 | 48,111 | 12 | 96,223 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p o... | instruction | 0 | 48,112 | 12 | 96,224 |
Yes | output | 1 | 48,112 | 12 | 96,225 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p o... | instruction | 0 | 48,113 | 12 | 96,226 |
Yes | output | 1 | 48,113 | 12 | 96,227 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p o... | instruction | 0 | 48,114 | 12 | 96,228 |
Yes | output | 1 | 48,114 | 12 | 96,229 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p o... | instruction | 0 | 48,115 | 12 | 96,230 |
No | output | 1 | 48,115 | 12 | 96,231 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p o... | instruction | 0 | 48,116 | 12 | 96,232 |
No | output | 1 | 48,116 | 12 | 96,233 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p o... | instruction | 0 | 48,117 | 12 | 96,234 |
No | output | 1 | 48,117 | 12 | 96,235 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given an array a of length 2n. Consider a partition of array a into two subsequences p and q of length n each (each element of array a should be in exactly one subsequence: either in p o... | instruction | 0 | 48,118 | 12 | 96,236 |
No | output | 1 | 48,118 | 12 | 96,237 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Little penguin Polo adores integer segments, that is, pairs of integers [l; r] (l ≤ r).
He has a set that consists of n integer segments: [l1; r1], [l2; r2], ..., [ln; rn]. We know that no two segments of this set intersect. In one move Po... | instruction | 0 | 48,227 | 12 | 96,454 |
Tags: brute force, implementation
Correct Solution:
```
import sys
input = sys.stdin.readline
n, k = [int(x) for x in input().split()]
summ = 0
for _ in range(n):
l, r = list(map(int, input().split()))
summ += r-l+1
if summ % k == 0: print(0)
else: print((summ//k+1)*k-summ)
``` | output | 1 | 48,227 | 12 | 96,455 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Little penguin Polo adores integer segments, that is, pairs of integers [l; r] (l ≤ r).
He has a set that consists of n integer segments: [l1; r1], [l2; r2], ..., [ln; rn]. We know that no two segments of this set intersect. In one move Po... | instruction | 0 | 48,228 | 12 | 96,456 |
Tags: brute force, implementation
Correct Solution:
```
n,k=map(int,input().split())
arr=[]
c=0
for i in range(n):
a,b=map(int,input().split())
c=c+b-a+1
if c%k==0:
print(0)
else:
print(k-c%k)
``` | output | 1 | 48,228 | 12 | 96,457 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Little penguin Polo adores integer segments, that is, pairs of integers [l; r] (l ≤ r).
He has a set that consists of n integer segments: [l1; r1], [l2; r2], ..., [ln; rn]. We know that no two segments of this set intersect. In one move Po... | instruction | 0 | 48,229 | 12 | 96,458 |
Tags: brute force, implementation
Correct Solution:
```
# A. Police Recruits
n, k = map(int, input().split())
res = 0
for i in range(n):
start, end = map(int, input().split())
res += end - start + 1
print(0 if not res%k else k - res%k)
``` | output | 1 | 48,229 | 12 | 96,459 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Little penguin Polo adores integer segments, that is, pairs of integers [l; r] (l ≤ r).
He has a set that consists of n integer segments: [l1; r1], [l2; r2], ..., [ln; rn]. We know that no two segments of this set intersect. In one move Po... | instruction | 0 | 48,230 | 12 | 96,460 |
Tags: brute force, implementation
Correct Solution:
```
n, k = [int(x) for x in input().split()]
s = 0
for i in range(n):
l, r = [int(x) for x in input().split()]
s += r - l + 1
print((k - s % k) % k)
``` | output | 1 | 48,230 | 12 | 96,461 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Little penguin Polo adores integer segments, that is, pairs of integers [l; r] (l ≤ r).
He has a set that consists of n integer segments: [l1; r1], [l2; r2], ..., [ln; rn]. We know that no two segments of this set intersect. In one move Po... | instruction | 0 | 48,231 | 12 | 96,462 |
Tags: brute force, implementation
Correct Solution:
```
n, k = map(int, input().split())
res = 0
for i in range(n):
l, r = map(int, input().split())
res += r - l + 1
print((k - res % k) % k)
``` | output | 1 | 48,231 | 12 | 96,463 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Little penguin Polo adores integer segments, that is, pairs of integers [l; r] (l ≤ r).
He has a set that consists of n integer segments: [l1; r1], [l2; r2], ..., [ln; rn]. We know that no two segments of this set intersect. In one move Po... | instruction | 0 | 48,232 | 12 | 96,464 |
Tags: brute force, implementation
Correct Solution:
```
from sys import stdin
n,k=map(int,stdin.readline().split())
ans=0
for i in range(n):
l,r=map(int,stdin.readline().split())
p=r-l+1
ans+=p
r=ans%k
if r==0:
print(0)
else:
print(k-r)
``` | output | 1 | 48,232 | 12 | 96,465 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a permutation of numbers from 1 to n. Determine whether there's a pair of integers a, b (1 ≤ a, b ≤ n; a ≠ b) such that the element <image> (note, that it is usual division, not integer one) is between a and b in this permutati... | instruction | 0 | 48,299 | 12 | 96,598 |
Tags: data structures, divide and conquer, hashing
Correct Solution:
```
n = int(input())
v = list(map(int, input().split()))
ans = "NO"
p = []
for i in range(n + 1):
p.append(-1)
for i in range(n):
p[v[i]] = i
for i in range(n - 1):
for j in range(i + 1, min(n, i + 6)):
if v[i] * 2 - v[j] >= 1 and ... | output | 1 | 48,299 | 12 | 96,599 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a permutation of numbers from 1 to n. Determine whether there's a pair of integers a, b (1 ≤ a, b ≤ n; a ≠ b) such that the element <image> (note, that it is usual division, not in... | instruction | 0 | 48,300 | 12 | 96,600 |
No | output | 1 | 48,300 | 12 | 96,601 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a permutation of numbers from 1 to n. Determine whether there's a pair of integers a, b (1 ≤ a, b ≤ n; a ≠ b) such that the element <image> (note, that it is usual division, not in... | instruction | 0 | 48,302 | 12 | 96,604 |
No | output | 1 | 48,302 | 12 | 96,605 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given matrix with n rows and n columns filled with zeroes. You should put k ones in it in such a way that the resulting matrix is symmetrical with respect to the main diagonal (the diagonal that goes from the top left to the bottom r... | instruction | 0 | 48,483 | 12 | 96,966 |
Tags: constructive algorithms
Correct Solution:
```
n, k = map(int, input().split())
if n * n < k:
print(-1)
else:
arr = [[0 for _ in range(n)] for _ in range(n)]
cnt = 0
for i in range(n):
if cnt < k:
arr[i][i] = 1
cnt += 1
for j in range(i + 1, n):
... | output | 1 | 48,483 | 12 | 96,967 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given matrix with n rows and n columns filled with zeroes. You should put k ones in it in such a way that the resulting matrix is symmetrical with respect to the main diagonal (the diagonal that goes from the top left to the bottom r... | instruction | 0 | 48,484 | 12 | 96,968 |
Tags: constructive algorithms
Correct Solution:
```
n,k = map(int,input().split())
ks = k
l = []
for i in range(n):
p = []
for j in range(n):
p.append(0)
l.append(p)
if(k>n**2):
print(-1)
else:
for i in range(n):
for j in range(n):
if k==0:
break
... | output | 1 | 48,484 | 12 | 96,969 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given matrix with n rows and n columns filled with zeroes. You should put k ones in it in such a way that the resulting matrix is symmetrical with respect to the main diagonal (the diagonal that goes from the top left to the bottom r... | instruction | 0 | 48,488 | 12 | 96,976 |
Tags: constructive algorithms
Correct Solution:
```
n,k = map(int,input().split())
if n*n<k:
print(-1)
else:
arr = [ [0]*n for i in range(n)]
if k!=0:
arr[0][0] = 1
k -= 1
i = 0
j = 1
while k>1 and i<n-1:
arr[i][j] = 1
arr[j][i] = 1
j += 1
if i==j-1:
k -= 1
else:
k -= 2
if j==n:
i += 1
... | output | 1 | 48,488 | 12 | 96,977 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given matrix with n rows and n columns filled with zeroes. You should put k ones in it in such a way that the resulting matrix is symmetrical with respect to the main diagonal (the diagonal that goes from the top left to the bottom r... | instruction | 0 | 48,489 | 12 | 96,978 |
Tags: constructive algorithms
Correct Solution:
```
n,k=map(int,input().split())
if k>n**2:
exit(print(-1))
else:
a=[[0]*n for i in range(n)]
for i in range(n):
for j in range(i,n):
if i!=j and k==1:
a[i+1][i+1]=1;k-=1
elif i==j and k>0:
a[i][j... | output | 1 | 48,489 | 12 | 96,979 |
Provide a correct Python 3 solution for this coding contest problem.
Given are an integer K and integers a_1,\dots, a_K. Determine whether a sequence P satisfying below exists. If it exists, find the lexicographically smallest such sequence.
* Every term in P is an integer between 1 and K (inclusive).
* For each i=1,... | instruction | 0 | 48,553 | 12 | 97,106 |
"Correct Solution:
```
import sys
def find_permutation(aaa, use):
"""
iの残り使用数がaaa[i-1]の状態で
集合useにある文字群(1～k)を後ろに繋げる方法で
それよりさらに後が破綻しないような繋げ方のうち
辞書順最小のものを求める。
ただし（この関数からは見えないが）現在確定済み配列の
末尾 (k - |use|) 個は、useに含まれない要素が1回ずつ登場することを前提とする。
（つまり、この関数の結果を繋げると、末尾 k 個が順列になる）
どうやっても破綻する場合はNone... | output | 1 | 48,553 | 12 | 97,107 |
Provide a correct Python 3 solution for this coding contest problem.
Let N be a positive integer. You are given a string s of length N - 1, consisting of `<` and `>`.
Find the number of permutations (p_1, p_2, \ldots, p_N) of (1, 2, \ldots, N) that satisfy the following condition, modulo 10^9 + 7:
* For each i (1 \l... | instruction | 0 | 48,606 | 12 | 97,212 |
"Correct Solution:
```
import sys
sys.setrecursionlimit(10 ** 7)
rl = sys.stdin.readline
def solve():
N = int(rl())
s = input()
MOD = 10 ** 9 + 7
dp = [[0] * N for _ in range(N)]
for i in range(N):
dp[0][i] = 1
acc = [i for i in range(1, N + 1)]
for i in range(1, N):
... | output | 1 | 48,606 | 12 | 97,213 |
Provide a correct Python 3 solution for this coding contest problem.
Let N be a positive integer. You are given a string s of length N - 1, consisting of `<` and `>`.
Find the number of permutations (p_1, p_2, \ldots, p_N) of (1, 2, \ldots, N) that satisfy the following condition, modulo 10^9 + 7:
* For each i (1 \l... | instruction | 0 | 48,608 | 12 | 97,216 |
"Correct Solution:
```
N=int(input())
s=input()
dp=[[0 for _ in range(N+1)] for i in range(N+1)]
MOD=10**9+7
dp[0][N]=1
dp[1]=[1]*N+[0]
cum=[0 for _ in range(N+2)]
for i in range(1,N):
cum[0]=0
for z in range(1,N-i+2):
cum[z]=(cum[z-1]+dp[i][z-1])%MOD
if s[i-1]=='<':
for j in range(0,N-i):... | output | 1 | 48,608 | 12 | 97,217 |
Provide a correct Python 3 solution for this coding contest problem.
Let N be a positive integer. You are given a string s of length N - 1, consisting of `<` and `>`.
Find the number of permutations (p_1, p_2, \ldots, p_N) of (1, 2, \ldots, N) that satisfy the following condition, modulo 10^9 + 7:
* For each i (1 \l... | instruction | 0 | 48,609 | 12 | 97,218 |
"Correct Solution:
```
n = int(input())
S = input()
p = 10**9+7
DP = [[0 for j in range(n+1)] for i in range(n+1)]
for j in range(n):
DP[1][j] = 1
for i in range(2, n+1):
A = [0]
for j in range(n):
A.append(A[-1]+DP[i-1][j])
for j in range(n-i+1):
if S[i-2] == '<':
DP[i][j] =... | output | 1 | 48,609 | 12 | 97,219 |
Provide a correct Python 3 solution for this coding contest problem.
Let N be a positive integer. You are given a string s of length N - 1, consisting of `<` and `>`.
Find the number of permutations (p_1, p_2, \ldots, p_N) of (1, 2, \ldots, N) that satisfy the following condition, modulo 10^9 + 7:
* For each i (1 \l... | instruction | 0 | 48,610 | 12 | 97,220 |
"Correct Solution:
```
# coding: utf-8
import sys
input = sys.stdin.readline
def f2(N, s):
MOD = int(1e9 + 7)
dp = [1] * N
for i in range(1, N):
csum = list(dp)
for j in range(1, N - i + 1):
csum[j] += csum[j - 1]
csum[j] %= MOD
csum_ = csum[N - i]
i... | output | 1 | 48,610 | 12 | 97,221 |
Provide a correct Python 3 solution for this coding contest problem.
Let N be a positive integer. You are given a string s of length N - 1, consisting of `<` and `>`.
Find the number of permutations (p_1, p_2, \ldots, p_N) of (1, 2, \ldots, N) that satisfy the following condition, modulo 10^9 + 7:
* For each i (1 \l... | instruction | 0 | 48,611 | 12 | 97,222 |
"Correct Solution:
```
N, = map(int, input().split())
M = 10**9+7
s = input().strip()
dp = [[0]*N for _ in range(N)]
for i in range(N):
dp[0][i] = 1
ss = N
for i, c in enumerate(s):
bs = 0
if c == ">":
for j in range(N-i):
ss -= dp[i][j]
dp[i+1][j] = ss%M
# dp[i+1]... | output | 1 | 48,611 | 12 | 97,223 |
Provide a correct Python 3 solution for this coding contest problem.
Let N be a positive integer. You are given a string s of length N - 1, consisting of `<` and `>`.
Find the number of permutations (p_1, p_2, \ldots, p_N) of (1, 2, \ldots, N) that satisfy the following condition, modulo 10^9 + 7:
* For each i (1 \l... | instruction | 0 | 48,612 | 12 | 97,224 |
"Correct Solution:
```
import sys,bisect,string,math,time,functools,random,fractions
from heapq import heappush,heappop,heapify
from collections import deque,defaultdict,Counter
from itertools import permutations,combinations,groupby
rep=range;R=range
def Golf():n,*t=map(int,open(0).read().split())
def I():return int(i... | output | 1 | 48,612 | 12 | 97,225 |
Provide a correct Python 3 solution for this coding contest problem.
Let N be a positive integer. You are given a string s of length N - 1, consisting of `<` and `>`.
Find the number of permutations (p_1, p_2, \ldots, p_N) of (1, 2, \ldots, N) that satisfy the following condition, modulo 10^9 + 7:
* For each i (1 \l... | instruction | 0 | 48,613 | 12 | 97,226 |
"Correct Solution:
```
N=int(input())
S=str(input())
P=10**9+7
DP=[[0]*(N+1) for _ in range(N+1)]
#初期
for index1 in range(N):
DP[1][index1]=1
for i in range(2,N):
#累積和
C=[0]*(N+1)
C[0]=DP[i-1][0]%P
for index2 in range(1,N+1):
C[index2]=(C[index2-1]+DP[i-1][index2])%P
for j in range(N-i... | output | 1 | 48,613 | 12 | 97,227 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let N be a positive integer. You are given a string s of length N - 1, consisting of `<` and `>`.
Find the number of permutations (p_1, p_2, \ldots, p_N) of (1, 2, \ldots, N) that satisfy the f... | instruction | 0 | 48,619 | 12 | 97,238 |
No | output | 1 | 48,619 | 12 | 97,239 |
Provide a correct Python 3 solution for this coding contest problem.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ at the end of $A$, if $d = 1$.
* randomAccess($p$): Prin... | instruction | 0 | 48,799 | 12 | 97,598 |
"Correct Solution:
```
from collections import deque
if __name__ == "__main__":
num_query = int(input())
int_que: deque = deque()
for _ in range(num_query):
op, *value = map(lambda x: int(x), input().split())
if (0 == op):
if (0 == value[0]):
int_que.appendleft(... | output | 1 | 48,799 | 12 | 97,599 |
Provide a correct Python 3 solution for this coding contest problem.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ at the end of $A$, if $d = 1$.
* randomAccess($p$): Prin... | instruction | 0 | 48,800 | 12 | 97,600 |
"Correct Solution:
```
def resolve():
from collections import deque
q = int(input())
ans = deque()
for _ in range(q):
q = [int(i) for i in input().split()]
if q[0] == 2:
if q[1] == 0:
ans.popleft()
else:
ans.pop()
else:
... | output | 1 | 48,800 | 12 | 97,601 |
Provide a correct Python 3 solution for this coding contest problem.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ at the end of $A$, if $d = 1$.
* randomAccess($p$): Prin... | instruction | 0 | 48,801 | 12 | 97,602 |
"Correct Solution:
```
from collections import deque
d = deque()
q = int(input())
for _ in range(q):
x = list(map(int, input().split()))
if x[0]==0:
dr = x[1]
val = x[2]
if dr==1:
d.append(val)
else:
d.appendleft(val)
elif x[0]==1:
print(d[x[... | output | 1 | 48,801 | 12 | 97,603 |
Provide a correct Python 3 solution for this coding contest problem.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ at the end of $A$, if $d = 1$.
* randomAccess($p$): Prin... | instruction | 0 | 48,802 | 12 | 97,604 |
"Correct Solution:
```
from collections import deque
num=int(input())
A=deque()
for i in range(num):
lst=list(map(int,input().split()))
if lst[0]==0:
if lst[1]==0:
A.appendleft(lst[2])
else :A.append(lst[2])
elif lst[0]==1:
print(A[lst[1]])
elif lst[0]==2:
if lst[1]==0:... | output | 1 | 48,802 | 12 | 97,605 |
Provide a correct Python 3 solution for this coding contest problem.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ at the end of $A$, if $d = 1$.
* randomAccess($p$): Prin... | instruction | 0 | 48,803 | 12 | 97,606 |
"Correct Solution:
```
from collections import deque
A=deque()
def push(A,d,x):
if d==0:
A.appendleft(x)
else:
A.append(x)
return A
def randomaccess(A,p):
print(A[p])
def pop(A,d):
if d==0:
A.popleft()
else:
A.pop()
return A
q=int(input())
for i in range(... | output | 1 | 48,803 | 12 | 97,607 |
Provide a correct Python 3 solution for this coding contest problem.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ at the end of $A$, if $d = 1$.
* randomAccess($p$): Prin... | instruction | 0 | 48,804 | 12 | 97,608 |
"Correct Solution:
```
from collections import deque
q=int(input())
lis=deque()
lq=[]
for i in range(q):
lq.append([int(x) for x in input().split(' ')])
for i in lq:
order=i[0]
if order==0:
d=i[1]
if d==0:
lis.appendleft(i[2])
else:
lis.append(i[2])
elif order==1:
print(lis[i[1]])
elif order==2:
d... | output | 1 | 48,804 | 12 | 97,609 |
Provide a correct Python 3 solution for this coding contest problem.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ at the end of $A$, if $d = 1$.
* randomAccess($p$): Prin... | instruction | 0 | 48,805 | 12 | 97,610 |
"Correct Solution:
```
from collections import deque
num = int(input())
A = deque()
for i in range(num):
queryi = list(map(int, input().split()))
if queryi[0] == 1:
print(A[queryi[1]])
elif queryi[0] == 2:
if queryi[1] == 0:
A.popleft()
else:
A.pop()
e... | output | 1 | 48,805 | 12 | 97,611 |
Provide a correct Python 3 solution for this coding contest problem.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ at the end of $A$, if $d = 1$.
* randomAccess($p$): Prin... | instruction | 0 | 48,806 | 12 | 97,612 |
"Correct Solution:
```
from collections import deque
Q = deque()
n = int(input())
for i in range(n):
x = list(map(int, input().split()))
if x[0] == 0:
if x[1] == 0:
Q.appendleft(x[2])
if x[1] == 1:
Q.append(x[2])
elif x[0] == 1:
print(Q[x[1]])
elif x[0] ==... | output | 1 | 48,806 | 12 | 97,613 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ ... | instruction | 0 | 48,807 | 12 | 97,614 |
Yes | output | 1 | 48,807 | 12 | 97,615 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ ... | instruction | 0 | 48,808 | 12 | 97,616 |
Yes | output | 1 | 48,808 | 12 | 97,617 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ ... | instruction | 0 | 48,809 | 12 | 97,618 |
Yes | output | 1 | 48,809 | 12 | 97,619 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ ... | instruction | 0 | 48,810 | 12 | 97,620 |
Yes | output | 1 | 48,810 | 12 | 97,621 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ ... | instruction | 0 | 48,811 | 12 | 97,622 |
No | output | 1 | 48,811 | 12 | 97,623 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ ... | instruction | 0 | 48,812 | 12 | 97,624 |
No | output | 1 | 48,812 | 12 | 97,625 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ ... | instruction | 0 | 48,813 | 12 | 97,626 |
No | output | 1 | 48,813 | 12 | 97,627 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For a dynamic array $A = \\{a_0, a_1, ...\\}$ of integers, perform a sequence of the following operations:
* push($d$, $x$): Add element $x$ at the begining of $A$, if $d = 0$. Add element $x$ ... | instruction | 0 | 48,814 | 12 | 97,628 |
No | output | 1 | 48,814 | 12 | 97,629 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given an array a consisting of n integers. Let's denote monotonic renumeration of array a as an array b consisting of n integers such that all of the following conditions are met:
* b_1 = 0;
* for every pair of indices i and j ... | instruction | 0 | 48,856 | 12 | 97,712 |
Tags: combinatorics, sortings
Correct Solution:
```
rd = lambda: list(map(int, input().split()))
n, a = rd()[0], rd()
mod = 998244353
b = sorted((x, i) for (i, x) in enumerate(a))
pts = []
px = b[0][0]
cmin = cmax = b[0][1]
for x, i in b[1:]:
if px == x:
cmax = i
else:
pts.append((cmin, -1))
... | output | 1 | 48,856 | 12 | 97,713 |
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