Submission #79518

#	Time	Username	Problem	Language	Result	Execution time	Memory
79518		minhtung0404	Bosses (BOI16_bosses)	C++17	100 / 100	793 ms	1084 KiB

bosses

//https://oj.uz/problem/view/BOI16_bosses

#include<bits/stdc++.h>
const int N = 5005;
using namespace std;

vector <int> adj[N];
int n, d[N], ans = N*N;

void bfs(int u){
    int sum = 0, cnt = 0;
    for (int i = 1; i <= n; i++) d[i] = 0;
    queue <int> mq;
    mq.push(u); d[u] = 1;
    while(mq.size()){
        int u = mq.front(); mq.pop();
        sum += d[u]; cnt++;
        for (auto v : adj[u]){
            if (!d[v]){
                d[v] = d[u] + 1;
                mq.push(v);
            }
        }
    }
    if (cnt == n) ans = min(ans, sum);
}

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) {
        int k, x; cin >> k;
        while (k--){
            cin >> x;
            adj[x].push_back(i);
        }
    }
    for (int i = 1; i <= n; i++) bfs(i);
    cout << ans;
}

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