Submission #1263330

#	Time	Username	Problem	Language	Result	Execution time	Memory
1263330		vladilius	Bosses (BOI16_bosses)	C++20	100 / 100	398 ms	732 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int n; cin>>n;
    vector<int> g[n + 1];
    for (int i = 1; i <= n; i++){
        int k; cin>>k;
        while (k--){
            int x; cin>>x;
            g[x].pb(i);
        }
    }
    
    int out = 1e9;
    for (int i = 1; i <= n; i++){
        vector<int> dist(n + 1, 1e9); dist[i] = 1;
        queue<int> q; q.push(i);
        while (!q.empty()){
            int v = q.front(); q.pop();
            for (int u: g[v]){
                if (dist[u] == 1e9){
                    dist[u] = dist[v] + 1;
                    q.push(u);
                }
            }
        }
        
        int s = 0;
        for (int j = 1; j <= n; j++){
            if (dist[j] == 1e9){
                s = -1;
            }
            s += dist[j];
        }
        
        if (s != -1){
            out = min(out, s);
        }
    }
    cout<<out<<"\n";
}

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 33 / 33