Submission #2626370


Source Code Expand

#include <bits/stdc++.h>

using namespace std;

#define REP(i,a,b) for(int i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vl;

ll N;
ll ans = 0;

void solve() {
    cin >> N;
    multiset<ll> st;
    ll cur = 0;
    rep(i,N) {
        ll a;
        cin >> a;
        st.insert(a);
        cur ^= a;
    }
    for (ll i = 30; i >= 0; --i) {
        if ((cur >> i) & 1) {
            if (!st.count(1 << i)) {
                cout << -1 << endl;
                return;
            }
            cur ^= (1 << i) - 1;
            auto it = st.find(1 << i);
            st.erase(it);
            st.insert((1 << i) - 1);
            ans++;
        }
    }
    cout << ans << endl;
}

int main() {
    cin.tie(0);
   	ios::sync_with_stdio(false);
    solve();
    return 0;
}

Submission Info

Submission Time
Task C - Cheating Nim
User bluenote
Language C++14 (GCC 5.4.1)
Score 0
Code Size 905 Byte
Status WA
Exec Time 48 ms
Memory 4992 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 WA 1 ms 256 KB
001.txt AC 1 ms 256 KB
002.txt AC 36 ms 4992 KB
003.txt AC 24 ms 3072 KB
004.txt AC 18 ms 2560 KB
005.txt AC 11 ms 1664 KB
006.txt WA 47 ms 4992 KB
007.txt WA 45 ms 4992 KB
008.txt WA 46 ms 4992 KB
009.txt WA 44 ms 4992 KB
010.txt WA 45 ms 4992 KB
011.txt WA 48 ms 4992 KB
012.txt WA 48 ms 4992 KB
013.txt WA 44 ms 4992 KB
014.txt WA 45 ms 4992 KB
015.txt WA 45 ms 4992 KB
016.txt AC 44 ms 4992 KB
017.txt AC 44 ms 4992 KB
018.txt WA 44 ms 4992 KB
019.txt WA 44 ms 4992 KB
020.txt AC 47 ms 4992 KB
021.txt AC 4 ms 640 KB
022.txt AC 4 ms 640 KB
023.txt AC 37 ms 4992 KB
example0.txt AC 1 ms 256 KB
example1.txt AC 1 ms 256 KB