Submission #768847

#	Time	Username	Problem	Language	Result	Execution time	Memory
768847		raysh07	Bosses (BOI16_bosses)	C++17	100 / 100	469 ms	720 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF (int)1e18
#define f first
#define s second

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

void Solve() 
{
    int n; cin >> n;
    vector<vector<int>> adj(n);
    int ans = INF;
    
    for (int i = 0; i < n; i++){
        int k; cin >> k;
        while (k--){
            int x; cin >> x;
            x--;
            adj[x].push_back(i);
        }
    }
    
    for (int i = 0; i < n; i++){
        vector <int> d(n, INF);
        queue <int> q;
        q.push(i);
        d[i] = 1;
        
        while (!q.empty()){
            int u = q.front();
            q.pop();
            for (int v : adj[u]){
                if (d[v] == INF){
                    d[v] = d[u] + 1;
                    q.push(v);
                }
            }
        }
        
        int cnt = 0;
        for (auto x : d) {
            cnt += x;
            if (x == INF) break;
        }
        
        ans = min(ans, cnt);
    }
    
    cout << ans << "\n";
}

int32_t main() 
{
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
   // cin >> t;
    for(int i = 1; i <= t; i++) 
    {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
    return 0;
}

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