Submission #1839714


Source Code Expand

#include<bits/stdc++.h>
#define range(i,a,b) for(int i = (a); i < (b); i++)
#define rep(i,b) for(int i = 0; i < (b); i++)
#define all(a) (a).begin(), (a).end()
#define show(x)  cerr << #x << " = " << (x) << endl;
//const int INF = 1e8;
using namespace std;

int main(){
	int n;
	cin >> n;

	vector<int> a(n);
	map<int,int> m;
	int s = 0;
	rep(i,n){
		cin >> a[i];
		m[ a[i] ]++;
		s ^= a[i];
	}

	bitset<30> b(s);
	int ans = 0;
	for(int i = 30 - 1; i >= 0; i--){
		//show(s)
		if(b[i]){
			int tmp = 1 << i;
			//show(tmp)
			if(m[tmp] > 0){
				m[tmp]--;
				s ^=  tmp;
				tmp--;
				s ^= tmp;

				ans++;
			}
		}
		b = bitset<30>(s);
	}

	for(auto i : m){
		if(i.second > 0 && i.first % 2 == 1){
			ans++;
			s ^= 1;
		}
	}

	cout << (s == 0 ? ans : -1) << endl;
}

Submission Info

Submission Time
Task C - Cheating Nim
User noy72
Language C++14 (GCC 5.4.1)
Score 0
Code Size 818 Byte
Status WA
Exec Time 66 ms
Memory 3584 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 500
Status
AC × 2
AC × 13
WA × 13
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 1 ms 256 KB
001.txt AC 1 ms 256 KB
002.txt AC 44 ms 640 KB
003.txt WA 18 ms 512 KB
004.txt AC 30 ms 2560 KB
005.txt AC 24 ms 1792 KB
006.txt WA 64 ms 3328 KB
007.txt WA 64 ms 3328 KB
008.txt WA 64 ms 3328 KB
009.txt WA 64 ms 3328 KB
010.txt WA 64 ms 3328 KB
011.txt WA 64 ms 3328 KB
012.txt WA 64 ms 3328 KB
013.txt WA 64 ms 3328 KB
014.txt WA 66 ms 3328 KB
015.txt WA 64 ms 3328 KB
016.txt AC 63 ms 3328 KB
017.txt AC 64 ms 3328 KB
018.txt WA 66 ms 3584 KB
019.txt WA 63 ms 3328 KB
020.txt AC 63 ms 3328 KB
021.txt AC 6 ms 640 KB
022.txt AC 6 ms 512 KB
023.txt AC 45 ms 640 KB
example0.txt AC 1 ms 256 KB
example1.txt AC 1 ms 256 KB