Submission #1272006

#	Time	Username	Problem	Language	Result	Execution time	Memory
1272006		oswaldzz	Logičari (COCI21_logicari)	C++20	10 / 110	11 ms	1204 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define nl endl
#define hehe ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL)  ;
 
// const int mod = 998244353;
const int mod = 1e9+7;
const int M = 2e5+5;

int count(int x){
    int c = 0;
    while(x){
        x &= (x - 1);
        c++;
    }
    return c;
}

void solve(){
    int n; cin >> n;
    int a[n+5] = {};
    for(int i = 1; i<=n; i++){
        int x,y; cin >> x >> y;
        a[x]|= 1ll << (y-1);
        a[y]|= 1ll << (x-1);
    }
    int tmp = LLONG_MAX;
    for(int i = 0; i< (1 << n); i++) {   
        bool ok = true;
        for (int j = 1; j<=n; j++) {  
            int t = a[j] & i;
            int cnt = count(t);  
            if(cnt!=1){
                ok = false;
                break;
            }    
        }
        if(ok){
            int cur = count(i);
            if(cur < tmp) tmp = cur;
        }
    }
    if(tmp == LLONG_MAX) cout << "-1" << nl;
    else cout << tmp << nl;
} 


signed main(){
    hehe
    // int t; cin >> t;
    int t = 1;
    while(t--){
        solve();
    }
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 40
• Subtask 4: 0 / 50