Submission #755288

#	Time	Username	Problem	Language	Result	Execution time	Memory
755288		kirakaminski968	Bosses (BOI16_bosses)	C++17	100 / 100	655 ms	640 KiB

bosses

#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int MAXN = 5005;
const int INF = 1e9;
vector<int> adj[MAXN];
int N;
ll bfs(int src){
    vector<int> depth(N+1,INF);
    queue<int> q;
    q.push(src); depth[src] = 1;
    while(!q.empty()){
        int u = q.front(), d = depth[u]; q.pop();
        for(auto v : adj[u]){
            if(d+1 < depth[v]){
                depth[v] = d+1;
                q.push(v);
            }
        }
    }
    ll ans = 0; bool good = true;
    for(int i = 1;i<=N;++i){
        if(depth[i] == INF){
            good = false;
            break;
        }
        ans += depth[i];
    }
    if(!good) return INF;
    return ans;
}
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> N;
    for(int i = 1;i<=N;++i){
        int K; cin >> K;
        for(int j = 1;j<=K;++j){
            int a; cin >> a;
            adj[a].push_back(i);
        }
    }
    ll minn = INF;
    for(int i = 1;i<=N;++i){
        minn = min(minn,bfs(i));
    }
    cout << minn << "\n";
    return 0;
}

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