Submission #1012892


Source Code Expand

#include <bits/stdc++.h>
using namespace std;

const int N = 100005;

int n, a[N], b[N];

void ins(int x) {
	for (int i = 30; i >= 0; i--) {
		if (x>>i&1) {
			if (b[i]) x ^= b[i];
			else {
				b[i] = x;
				break;
			}
		}
	}
}

int main() {
	scanf("%d", &n);
	int tot = 0, x;
	for (int i = 1; i <= n; i++) {
		scanf("%d", &x);
		tot ^= x;
		ins(x^(x - 1));
	}
	int ans = 0;
	for (int i = 30; i >= 0; i--) {
		if (tot>>i&1) {
			if (b[i]) {
				ans++;
				tot ^= b[i];
			}
		}
	}
	if (tot) printf("-1\n");
	else printf("%d\n", ans);
	return 0;
}

Submission Info

Submission Time
Task C - Cheating Nim
User lab104_yifan
Language C++14 (GCC 5.4.1)
Score 500
Code Size 589 Byte
Status AC
Exec Time 20 ms
Memory 384 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:21:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
./Main.cpp:24:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x);
                  ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 500 / 500
Status
AC × 2
AC × 26
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 20 ms 256 KB
003.txt AC 11 ms 256 KB
004.txt AC 10 ms 256 KB
005.txt AC 7 ms 256 KB
006.txt AC 20 ms 256 KB
007.txt AC 20 ms 256 KB
008.txt AC 20 ms 256 KB
009.txt AC 20 ms 256 KB
010.txt AC 20 ms 256 KB
011.txt AC 20 ms 256 KB
012.txt AC 20 ms 256 KB
013.txt AC 20 ms 256 KB
014.txt AC 20 ms 256 KB
015.txt AC 20 ms 256 KB
016.txt AC 20 ms 256 KB
017.txt AC 20 ms 256 KB
018.txt AC 20 ms 256 KB
019.txt AC 20 ms 256 KB
020.txt AC 20 ms 256 KB
021.txt AC 4 ms 256 KB
022.txt AC 4 ms 256 KB
023.txt AC 19 ms 256 KB
example0.txt AC 3 ms 256 KB
example1.txt AC 3 ms 384 KB