oj.uz

Submission #389331

# Submission time Handle Problem Language Result Execution time Memory
389331 2021-04-14T03:05:32 Z wiwiho XOR Sum (info1cup17_xorsum) C++14
11 / 100
 92 ms 460 KB 
#include <bits/stdc++.h>

#define mp make_pair
#define F first
#define S second
#define eb emplace_back
#define printv(a, b) { \
    for(auto pv : a) b << pv << " "; \
    b << "\n"; \
}

using namespace std;

typedef long long ll;

using pii = pair<int, int>;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;

    vector<ll> cnt(4001);
    int ans = 0;
    for(int i = 1; i <= n; i++){
        int v;
        cin >> v;
        cnt[v]++;
    }

    for(int i = 1; i <= 4000; i++){
        for(int j  = 1; j < i; j++){
            if(cnt[i] * cnt[j] % 2) ans ^= i + j;
            //cerr << cnt[i] << " " << cnt[j] << " " << cnt[i] * cnt[j] << " " << i + j << " " << ans << "\n";
        }
        if(cnt[i] * (cnt[i] + 1) / 2 % 2) ans ^= i + i;
    }
    cout << ans << "\n";

    return 0;
}

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 460 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 332 KB Output is correct
2 Correct 86 ms 332 KB Output is correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 332 KB Output is correct
2 Correct 86 ms 332 KB Output is correct
3 Runtime error 1 ms 460 KB Execution killed with signal 11
4 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 460 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 460 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -