Submission #1096937

#	Time	Username	Problem	Language	Result	Execution time	Memory
1096937		Zone_zonee	Bosses (BOI16_bosses)	C++17	100 / 100	388 ms	780 KiB

bosses

#include <bits/stdc++.h>
using namespace std;

int n;
vector<int> adj[5050];
bool vis[5050];
int bfs(int f){
    memset(vis, 0, sizeof vis);
    int res = 0, cnt = 0;
    queue<pair<int, int>> q;
    q.emplace(f, 1);
    vis[f] = 1;
    while(!q.empty()){
        auto [u, d] = q.front(); q.pop();
        res += d;
        cnt++;
        for(int v : adj[u]){
            if(vis[v]) continue;
            vis[v] = 1;
            q.emplace(v, d + 1);
        }
    }
    if(cnt == n) return res;
    return 1e9;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n;
    for(int i = 1; i <= n; ++i){
        int m; cin >> m;
        while(m--){
            int v; cin >> v;
            adj[v].emplace_back(i);
        }
    }
    int ans = 1e9;
    for(int i = 1; i <= n; ++i){
        ans = min(ans, bfs(i));
    }
    cout << ans;
}

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