Submission #2372685


Source Code Expand

#include "bits/stdc++.h"
#define in std::cin
#define out std::cout
#define rep(i,N) for(int i=0;i<N;++i)
typedef long long int LL;

LL N, x, ans;

int main()
{
	in >> N;
	std::vector<LL>a(N);
	std::vector<bool>flag(N);
	rep(i, N) in >> a[i];
	rep(i, N) x ^= a[i];
	for (LL k = 32; k >= 0; --k)
	{
		while (x & (1LL << k) && ans < N)
		{
			bool ok = false;
			rep(i, N)
			{
				if (!flag[i] && (a[i] & (1LL << k)))
				{
					--a[i];
					++ans;
					ok = flag[i] = true;
					break;
				}
			}
			if (!ok) break;
			x = 0;
			rep(i, N) x ^= a[i];
		}
	}
	out << (x == 0 ? ans : -1) << std::endl;
	return 0;
}

Submission Info

Submission Time
Task C - Cheating Nim
User Bwambocos
Language C++14 (GCC 5.4.1)
Score 0
Code Size 649 Byte
Status WA
Exec Time 2103 ms
Memory 1152 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 500
Status
AC × 2
AC × 9
WA × 13
TLE × 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 1 ms 256 KB
001.txt AC 1 ms 256 KB
002.txt AC 43 ms 1024 KB
003.txt WA 21 ms 768 KB
004.txt TLE 2103 ms 640 KB
005.txt TLE 2090 ms 512 KB
006.txt WA 47 ms 1024 KB
007.txt WA 47 ms 1024 KB
008.txt WA 51 ms 1024 KB
009.txt WA 47 ms 1024 KB
010.txt WA 44 ms 1024 KB
011.txt WA 43 ms 1024 KB
012.txt WA 42 ms 1024 KB
013.txt WA 46 ms 1024 KB
014.txt WA 49 ms 1152 KB
015.txt WA 49 ms 1024 KB
016.txt AC 1253 ms 1024 KB
017.txt TLE 2103 ms 1024 KB
018.txt WA 46 ms 1024 KB
019.txt WA 47 ms 1024 KB
020.txt AC 942 ms 1024 KB
021.txt AC 180 ms 256 KB
022.txt AC 179 ms 384 KB
023.txt TLE 2103 ms 1024 KB
example0.txt AC 1 ms 256 KB
example1.txt AC 1 ms 256 KB