Submission #3620542


Source Code Expand

#include "bits/stdc++.h"
#define rep(i,a,n) for(int i = a;i < n;i++)
#define MOD 1000000007
typedef unsigned long long ull;
typedef long long ll;
using namespace std;

int main(){
	ll n,cnt = 1;
	cin >> n;
	ll a[n],b[n];
	
	rep(i,0,n){
		cin >> a[i];
		b[i] = abs(n-2*i-1);
	}
	
	sort(a,a+n);
	sort(b,b+n);
	
	rep(i,0,n){
		if(a[i] != b[i]){
			cout << 0 << endl;
			return 0;
		}
	}
	
	rep(i,0,n/2){
		cnt *= 2;
		cnt %= MOD;
	}
	
	cout << cnt << endl;
	
	return 0;
}

Submission Info

Submission Time
Task C - Lining Up
User new_textfile
Language C++14 (GCC 5.4.1)
Score 300
Code Size 503 Byte
Status AC
Exec Time 43 ms
Memory 1792 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 300 / 300
Status
AC × 3
AC × 14
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt
All sample_01.txt, sample_02.txt, sample_03.txt, subtask_1_invalid_01.txt, subtask_1_invalid_02.txt, subtask_1_max_01.txt, subtask_1_max_02.txt, subtask_1_max_valid_01.txt, subtask_1_max_valid_02.txt, subtask_1_min_valid_01.txt, subtask_1_rand_01.txt, subtask_1_rand_02.txt, subtask_1_valid_01.txt, subtask_1_valid_02.txt
Case Name Status Exec Time Memory
sample_01.txt AC 2 ms 256 KB
sample_02.txt AC 2 ms 256 KB
sample_03.txt AC 2 ms 256 KB
subtask_1_invalid_01.txt AC 36 ms 1536 KB
subtask_1_invalid_02.txt AC 8 ms 512 KB
subtask_1_max_01.txt AC 43 ms 1792 KB
subtask_1_max_02.txt AC 43 ms 1792 KB
subtask_1_max_valid_01.txt AC 43 ms 1792 KB
subtask_1_max_valid_02.txt AC 43 ms 1792 KB
subtask_1_min_valid_01.txt AC 1 ms 256 KB
subtask_1_rand_01.txt AC 27 ms 1152 KB
subtask_1_rand_02.txt AC 40 ms 1664 KB
subtask_1_valid_01.txt AC 24 ms 1152 KB
subtask_1_valid_02.txt AC 9 ms 512 KB