message stringlengths 2 43.5k | message_type stringclasses 2
values | message_id int64 0 1 | conversation_id int64 853 107k | cluster float64 24 24 | __index_level_0__ int64 1.71k 214k |
|---|---|---|---|---|---|
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
* After the cutting the number of ribbon piec... | instruction | 0 | 29,390 | 24 | 58,780 |
Tags: brute force, dp
Correct Solution:
```
n, a,b,c = map(int, input().split())
z = [0] + [-999999] * 50000
for i in range(1,n+1):
z[i] = max(z[i-a],z[i-b],z[i-c]) + 1
print(z[n])
``` | output | 1 | 29,390 | 24 | 58,781 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
* After the cutting the number of ribbon piec... | instruction | 0 | 29,391 | 24 | 58,782 |
Tags: brute force, dp
Correct Solution:
```
import sys
import math
from collections import Counter
from collections import OrderedDict
from collections import defaultdict
from functools import reduce
sys.setrecursionlimit(10**6)
def inputt():
return sys.stdin.readline().strip()
def printt(n):
sys.stdout.write(s... | output | 1 | 29,391 | 24 | 58,783 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
* After the cutting the number of ribbon piec... | instruction | 0 | 29,392 | 24 | 58,784 |
Tags: brute force, dp
Correct Solution:
```
n, a, b, c = map(int, input().split())
tmp = [a, b, c]
tmp.sort()
tmp.reverse()
a, b, c = tmp
ans = 0
for x in range(n // a + 1):
for y in range(n // b + 1):
k = n - a * x - b * y
if k < 0 or k % c != 0:
continue
z = k // c
ans ... | output | 1 | 29,392 | 24 | 58,785 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
* After the cutting the number of ribbon piec... | instruction | 0 | 29,393 | 24 | 58,786 |
Tags: brute force, dp
Correct Solution:
```
n,a,b,c=[int(x) for x in input().split()]
x,y,z=sorted([a,b,c])
L=[]
for i in range(n//z+1):
if i==n/z:
L.append(int(i))
break
else:
for j in range((n-i*z)//y+1):
if j==(n-i*z)/y:
L.append(int(i+j))
b... | output | 1 | 29,393 | 24 | 58,787 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
* After the cutting the number of ribbon piec... | instruction | 0 | 29,394 | 24 | 58,788 |
Tags: brute force, dp
Correct Solution:
```
N,a,b,c = map(int,input().split())
dp = [[0]+[-1e9 for x in range(4002)] for x in range(4)]
def max_ribbon(W, val, n):
# Build table K[][] in bottom up manner
for i in range(1,n + 1):
for w in range(1,W + 1):
if val[i-1] <= w:
dp[i][w] = max(dp[i-1][w], 1 + d... | output | 1 | 29,394 | 24 | 58,789 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
* After the cutting the number of ribbon piec... | instruction | 0 | 29,395 | 24 | 58,790 |
Tags: brute force, dp
Correct Solution:
```
inp=list(map(int,input().split()))
n=inp[0]
arr=inp[1:]
t=[[0 for i in range(n+1)] for i in range(4)]
for j in range(n+1):
t[0][j]=float("-inf")
for i in range(1,4):
for j in range(1,n+1):
if(arr[i-1]<=j):
t[i][j]=max(1+t[i][j-arr[i-1]],t[i-1][j... | output | 1 | 29,395 | 24 | 58,791 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
* After the cutting the number of ribbon piec... | instruction | 0 | 29,396 | 24 | 58,792 |
Tags: brute force, dp
Correct Solution:
```
n, a, b, c = map(int, input().split())
arr = [0] + [int(-1e7)] * 4200
for i in range(1, n + 1):
arr[i] = max(arr[i - a], arr[i - b], arr[i - c]) + 1
print(arr[n])
``` | output | 1 | 29,396 | 24 | 58,793 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
... | instruction | 0 | 29,397 | 24 | 58,794 |
Yes | output | 1 | 29,397 | 24 | 58,795 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
... | instruction | 0 | 29,398 | 24 | 58,796 |
Yes | output | 1 | 29,398 | 24 | 58,797 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
... | instruction | 0 | 29,399 | 24 | 58,798 |
Yes | output | 1 | 29,399 | 24 | 58,799 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
... | instruction | 0 | 29,400 | 24 | 58,800 |
Yes | output | 1 | 29,400 | 24 | 58,801 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
... | instruction | 0 | 29,401 | 24 | 58,802 |
No | output | 1 | 29,401 | 24 | 58,803 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
... | instruction | 0 | 29,402 | 24 | 58,804 |
No | output | 1 | 29,402 | 24 | 58,805 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
... | instruction | 0 | 29,403 | 24 | 58,806 |
No | output | 1 | 29,403 | 24 | 58,807 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus has a ribbon, its length is n. He wants to cut the ribbon in a way that fulfils the following two conditions:
* After the cutting each ribbon piece should have length a, b or c.
... | instruction | 0 | 29,404 | 24 | 58,808 |
No | output | 1 | 29,404 | 24 | 58,809 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We already know of the large corporation where Polycarpus works as a system administrator. The computer network there consists of n computers and m cables that connect some pairs of computers. I... | instruction | 0 | 30,386 | 24 | 60,772 |
No | output | 1 | 30,386 | 24 | 60,773 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarpus got an internship in one well-known social network. His test task is to count the number of unique users who have visited a social network during the day. Polycarpus was provided with information on all user requests for this time... | instruction | 0 | 31,358 | 24 | 62,716 |
Tags: greedy, two pointers
Correct Solution:
```
def main():
mode="filee"
if mode=="file":f=open("test.txt","r")
get = lambda :[int(x) for x in (f.readline() if mode=="file" else input()).split()]
gets = lambda :[str(x) for x in (f.readline()[:-1] if mode=="file" else input()).split(":")]
[n,m,t]=ge... | output | 1 | 31,358 | 24 | 62,717 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarpus got an internship in one well-known social network. His test task is to count the number of unique users who have visited a social network during the day. Polycarpus was provided with information on all user requests for this time... | instruction | 0 | 31,359 | 24 | 62,718 |
Tags: greedy, two pointers
Correct Solution:
```
def main():
mode="filee"
if mode=="file":f=open("test.txt","r")
get = lambda :[int(x) for x in (f.readline() if mode=="file" else input()).split()]
gets = lambda :[str(x) for x in (f.readline()[:-1] if mode=="file" else input()).split(":")]
[n,m,t]=ge... | output | 1 | 31,359 | 24 | 62,719 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus got an internship in one well-known social network. His test task is to count the number of unique users who have visited a social network during the day. Polycarpus was provided with... | instruction | 0 | 31,360 | 24 | 62,720 |
No | output | 1 | 31,360 | 24 | 62,721 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus got an internship in one well-known social network. His test task is to count the number of unique users who have visited a social network during the day. Polycarpus was provided with... | instruction | 0 | 31,361 | 24 | 62,722 |
No | output | 1 | 31,361 | 24 | 62,723 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus got an internship in one well-known social network. His test task is to count the number of unique users who have visited a social network during the day. Polycarpus was provided with... | instruction | 0 | 31,362 | 24 | 62,724 |
No | output | 1 | 31,362 | 24 | 62,725 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarpus got an internship in one well-known social network. His test task is to count the number of unique users who have visited a social network during the day. Polycarpus was provided with... | instruction | 0 | 31,363 | 24 | 62,726 |
No | output | 1 | 31,363 | 24 | 62,727 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array of size n such that each integer from 1 to n occ... | instruction | 0 | 31,868 | 24 | 63,736 |
Tags: data structures
Correct Solution:
```
import os
import sys
from io import BytesIO, IOBase
# region fastio
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in f... | output | 1 | 31,868 | 24 | 63,737 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array of size n such that each integer from 1 to n occ... | instruction | 0 | 31,869 | 24 | 63,738 |
Tags: data structures
Correct Solution:
```
import io
import os
class SortedList:
def __init__(self, iterable=[], _load=200):
"""Initialize sorted list instance."""
values = sorted(iterable)
self._len = _len = len(values)
self._load = _load
self._lists = _lists = [values[i ... | output | 1 | 31,869 | 24 | 63,739 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array of size n such that each integer from 1 to n occ... | instruction | 0 | 31,870 | 24 | 63,740 |
Tags: data structures
Correct Solution:
```
n, m = map(int, input().split())
a = [int(i) - 1 for i in input().split()]
ans1 = [i + 1 for i in range(n)]
ans2 = [-1 for i in range(n)]
for i in set(a):
ans1[i] = 1
N = 1
while N < n + m: N <<= 1
st = [0 for i in range(N << 1)]
pos = [i + m for i in range(n)]
for i in r... | output | 1 | 31,870 | 24 | 63,741 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array of size n such that each integer from 1 to n occ... | instruction | 0 | 31,871 | 24 | 63,742 |
Tags: data structures
Correct Solution:
```
import io
import os
import random
# From https://github.com/cheran-senthil/PyRival/blob/master/pyrival/data_structures/Treap.py
# Modified to support bisect_left/bisect_right/__getitem__ like SortedList
class TreapMultiSet(object):
root = 0
size = 0
def __init... | output | 1 | 31,871 | 24 | 63,743 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array of size n such that each integer from 1 to n occ... | instruction | 0 | 31,872 | 24 | 63,744 |
Tags: data structures
Correct Solution:
```
from sys import stdin, stdout
def update(bita, pos, v):
while pos < len(bita):
bita[pos] += v
pos += lowbit(pos)
def query(bita, pos):
res = 0
while pos > 0:
res += bita[pos]
pos -= lowbit(pos)
return res
def lowbit(p):
... | output | 1 | 31,872 | 24 | 63,745 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array of size n such that each integer from 1 to n occ... | instruction | 0 | 31,873 | 24 | 63,746 |
Tags: data structures
Correct Solution:
```
import sys
input = sys.stdin.buffer.readline
class FastIntregral:
def __init__(self, n, *args, **kwargs):
self.mData = [0 for i in range(n+1)]
self.mSize = n
def upd(self, index , value):
while index <= self.mSize:
self.mData[index... | output | 1 | 31,873 | 24 | 63,747 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array of size n such that each integer from 1 to n occ... | instruction | 0 | 31,874 | 24 | 63,748 |
Tags: data structures
Correct Solution:
```
from __future__ import division, print_function
from bisect import bisect_left
import os
import sys
from io import BytesIO, IOBase
if sys.version_info[0] < 3:
from __builtin__ import xrange as range
from future_builtins import ascii, filter, hex, map, oct, zip
alpha... | output | 1 | 31,874 | 24 | 63,749 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array of size n such that each integer from 1 to n occ... | instruction | 0 | 31,875 | 24 | 63,750 |
Tags: data structures
Correct Solution:
```
import io
import os
import random
# From https://github.com/cheran-senthil/PyRival/blob/master/pyrival/data_structures/Treap.py
# Modified to support bisect_left/bisect_right/__getitem__ like SortedList
class TreapMultiSet(object):
root = 0
size = 0
def __init... | output | 1 | 31,875 | 24 | 63,751 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array o... | instruction | 0 | 31,876 | 24 | 63,752 |
Yes | output | 1 | 31,876 | 24 | 63,753 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array o... | instruction | 0 | 31,877 | 24 | 63,754 |
Yes | output | 1 | 31,877 | 24 | 63,755 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array o... | instruction | 0 | 31,878 | 24 | 63,756 |
Yes | output | 1 | 31,878 | 24 | 63,757 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array o... | instruction | 0 | 31,879 | 24 | 63,758 |
Yes | output | 1 | 31,879 | 24 | 63,759 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array o... | instruction | 0 | 31,880 | 24 | 63,760 |
No | output | 1 | 31,880 | 24 | 63,761 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array o... | instruction | 0 | 31,881 | 24 | 63,762 |
No | output | 1 | 31,881 | 24 | 63,763 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array o... | instruction | 0 | 31,882 | 24 | 63,764 |
No | output | 1 | 31,882 | 24 | 63,765 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, numbered from 1 to n.
Recall that a permutation of size n is an array o... | instruction | 0 | 31,883 | 24 | 63,766 |
No | output | 1 | 31,883 | 24 | 63,767 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whiteboard);
* he wrote the number a_2 to the right... | instruction | 0 | 31,952 | 24 | 63,904 |
Tags: implementation, two pointers
Correct Solution:
```
for _ in range (int(input())):
n=int(input())
arr=list(map(int,input().split()[:n]))
arr1=[0]*n
i=0
if n%2!=0:
for j in range (0,n,2):
arr1[j]=arr[i]
i+=1
for k in range (n-2,0,-2):
arr1[k]=a... | output | 1 | 31,952 | 24 | 63,905 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whiteboard);
* he wrote the number a_2 to the right... | instruction | 0 | 31,953 | 24 | 63,906 |
Tags: implementation, two pointers
Correct Solution:
```
test_cases = int(input())
for i in range(test_cases):
size = int(input())
arr = list(map(int, input().split()))
ans = []
for i in range(size // 2):
ans.append(str(arr[i]))
ans.append(str(arr[size-i-1]))
if size % 2 != 0:
... | output | 1 | 31,953 | 24 | 63,907 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whiteboard);
* he wrote the number a_2 to the right... | instruction | 0 | 31,954 | 24 | 63,908 |
Tags: implementation, two pointers
Correct Solution:
```
t = int(input())
ans = []
for i in range(t):
n = int(input())
b = input().split()
i = 0
j = len(b) - 1
res = []
while i < j:
res.append(b[i])
res.append(b[j])
i += 1
j -= 1
if i == j:
res.append... | output | 1 | 31,954 | 24 | 63,909 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whiteboard);
* he wrote the number a_2 to the right... | instruction | 0 | 31,955 | 24 | 63,910 |
Tags: implementation, two pointers
Correct Solution:
```
from collections import deque
def solution(n, blist):
deq = deque(blist)
ans = []
for i in range(len(blist)):
if i % 2 == 0:
ans.append(deq.popleft())
else:
ans.append(deq.pop())
return ans
t = int(input()... | output | 1 | 31,955 | 24 | 63,911 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whiteboard);
* he wrote the number a_2 to the right... | instruction | 0 | 31,956 | 24 | 63,912 |
Tags: implementation, two pointers
Correct Solution:
```
t=int(input())
while(t>0):
n=int(input())
arr=list(map(int,input().strip().split()))
l=len(arr)
l1=[]
l2=[]
flag=0
if(l%2!=0):
x=arr[l//2]
flag=1
l1=arr[:l//2]
l2=arr[(l//2)+1:]
else:
l1=arr[... | output | 1 | 31,956 | 24 | 63,913 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whiteboard);
* he wrote the number a_2 to the right... | instruction | 0 | 31,957 | 24 | 63,914 |
Tags: implementation, two pointers
Correct Solution:
```
t=int(input())
for _ in range(t):
n=int(input())
l=list(map(int,input().split()))
l1=l[::-1]
k=[]
o=0
j=0
for i in range(n):
if(i%2==0):
k.append(l[o])
o+=1
else:
k.append(l1[j])
... | output | 1 | 31,957 | 24 | 63,915 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whiteboard);
* he wrote the number a_2 to the right... | instruction | 0 | 31,958 | 24 | 63,916 |
Tags: implementation, two pointers
Correct Solution:
```
import math ;
t = int(input());
while(t > 0 ):
t-=1 ;
n = int(input());
a = list(map(int , input().split(' ')))
ans = []
for i in range(int(n/2)):
ans.append(a[i]);
ans.append(a[n-1-i]);
if(n%2 > 0 ):
ans.app... | output | 1 | 31,958 | 24 | 63,917 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whiteboard);
* he wrote the number a_2 to the right... | instruction | 0 | 31,959 | 24 | 63,918 |
Tags: implementation, two pointers
Correct Solution:
```
n = int(input())
for i in range(n):
t = int(input())
s = input().split()
q = 0
w = t-1
if abs(q-w) == 1:
print(s[q], s[w])
elif len(s) == 1:
print(*s)
else:
while q != w:
print(s[q],s[w],end = ' ')
... | output | 1 | 31,959 | 24 | 63,919 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whitebo... | instruction | 0 | 31,960 | 24 | 63,920 |
Yes | output | 1 | 31,960 | 24 | 63,921 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whitebo... | instruction | 0 | 31,961 | 24 | 63,922 |
Yes | output | 1 | 31,961 | 24 | 63,923 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whitebo... | instruction | 0 | 31,962 | 24 | 63,924 |
Yes | output | 1 | 31,962 | 24 | 63,925 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp has a favorite sequence a[1 ... n] consisting of n integers. He wrote it out on the whiteboard as follows:
* he wrote the number a_1 to the left side (at the beginning of the whitebo... | instruction | 0 | 31,963 | 24 | 63,926 |
Yes | output | 1 | 31,963 | 24 | 63,927 |
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