Submission #1101583


Source Code Expand

#include <bits/stdc++.h>
#define ll long long
#define INF 999999999
#define MOD 1000000007
#define rep(i,n) for(int i=0;i<n;i++)

using namespace std;

typedef pair<int,int>P;

const int MAX_N = 100005;

int a[MAX_N];
int b[MAX_N];

int main()
{
	int n,x=0,ans=0;
	cin >> n;
	rep(i,n){
		scanf("%d",&a[i]);
		x ^= a[i];
		b[i] = a[i]^(a[i]-1);
	}
	for(int k=29;k>0;k--){
		rep(i,n){
			if(b[i] == pow(2,k)-1){
				if(x & (1 << (k-1))){
					x ^= b[i];
					ans++;
				}
			}
		}
	}
	if(x==0){
		cout << ans << "\n";
	}else{
		cout << "-1\n";
	}
}

Submission Info

Submission Time
Task C - Cheating Nim
User kopricky
Language C++14 (GCC 5.4.1)
Score 0
Code Size 585 Byte
Status WA
Exec Time 202 ms
Memory 1024 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:21:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a[i]);
                    ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 500
Status
AC × 2
AC × 22
WA × 4
Set Name Test Cases
Sample example0.txt, example1.txt
All 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, example0.txt, example1.txt
Case Name Status Exec Time Memory
000.txt AC 3 ms 256 KB
001.txt AC 3 ms 256 KB
002.txt AC 201 ms 1024 KB
003.txt AC 121 ms 768 KB
004.txt AC 97 ms 640 KB
005.txt AC 61 ms 512 KB
006.txt WA 202 ms 1024 KB
007.txt AC 202 ms 1024 KB
008.txt WA 202 ms 1024 KB
009.txt WA 202 ms 1024 KB
010.txt AC 202 ms 1024 KB
011.txt WA 202 ms 1024 KB
012.txt AC 202 ms 1024 KB
013.txt AC 202 ms 1024 KB
014.txt AC 202 ms 1024 KB
015.txt AC 202 ms 1024 KB
016.txt AC 202 ms 1024 KB
017.txt AC 202 ms 1024 KB
018.txt AC 202 ms 1024 KB
019.txt AC 202 ms 1024 KB
020.txt AC 202 ms 1024 KB
021.txt AC 21 ms 256 KB
022.txt AC 21 ms 256 KB
023.txt AC 201 ms 1024 KB
example0.txt AC 3 ms 256 KB
example1.txt AC 3 ms 256 KB