oj.uz

Submission #655512

# Submission time Handle Problem Language Result Execution time Memory
655512 2022-11-04T15:21:49 Z google Logičari (COCI21_logicari) C++17
0 / 110
 136 ms 212 KB 
#include<bits/stdc++.h>
using namespace std;
int n,a,b;
vector<pair<int,int>> e;
int main(){
    cin.tie(0)->sync_with_stdio(0);
    cin >> n;
    for (int i = 0;i<n;i++){
        cin >> a >> b;e.push_back({a-1,b-1});
    }
    int ans = 100;
    if (n > 0) {
        if (n%4 == 0) cout << n/2;
        else cout << -1;
    }
    for (int mask = 0;mask<1<<n;mask++){
        vector<int> cnt(n,0);
        for (int i = 0;i<n;i++){
            if ((1<<e[i].second)&mask) cnt[e[i].first]++;
            if ((1<<e[i].first)&mask) cnt[e[i].second]++;
        }
        int pos = 1;
        for (int i = 0;i<n;i++){
            if (cnt[i] != pos){
                pos = 0;
                break;
            }
        }
        if (pos) ans = min(ans,__popcount(mask));
    }
    if (ans == 100) ans = -1;
    cout << ans;
    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 136 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 136 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 50.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -