Submission #3195507


Source Code Expand

#include <iostream>
using namespace std;
int main() {
    int n; cin >> n;
    int a[n], x = 0, ans = 0;
    for (int i = 0; i < n; i++) { cin >> a[i]; x ^= a[i]; }
    bool used[n] = {};
    while (x != 0) {
        int e = 0;
        while (x >= 2 << e) e++;
        for (int i = 0; i < n; i++) if (a[i] % (2<<e) == 1<<e && !used[i]) { x ^= a[i] ^ (a[i]-1); a[i]--; used[i] = true; ans++; break; }
        if (x >= (1 << e)) { cout << "-1\n"; return 0; }
    }
    cout << ans << endl;
}

Submission Info

Submission Time
Task C - Cheating Nim
User kozima
Language C++14 (GCC 5.4.1)
Score 500
Code Size 505 Byte
Status AC
Exec Time 59 ms
Memory 768 KB

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 1 ms 256 KB
001.txt AC 1 ms 256 KB
002.txt AC 59 ms 768 KB
003.txt AC 17 ms 512 KB
004.txt AC 20 ms 512 KB
005.txt AC 17 ms 384 KB
006.txt AC 54 ms 768 KB
007.txt AC 53 ms 768 KB
008.txt AC 54 ms 768 KB
009.txt AC 53 ms 768 KB
010.txt AC 54 ms 768 KB
011.txt AC 53 ms 768 KB
012.txt AC 54 ms 768 KB
013.txt AC 53 ms 768 KB
014.txt AC 54 ms 768 KB
015.txt AC 53 ms 768 KB
016.txt AC 54 ms 768 KB
017.txt AC 54 ms 768 KB
018.txt AC 53 ms 768 KB
019.txt AC 53 ms 768 KB
020.txt AC 54 ms 768 KB
021.txt AC 6 ms 256 KB
022.txt AC 6 ms 256 KB
023.txt AC 53 ms 768 KB
example0.txt AC 1 ms 256 KB
example1.txt AC 1 ms 256 KB