Submission #950419

#	Time	Username	Problem	Language	Result	Execution time	Memory
950419		LucaIlie	Bosses (BOI16_bosses)	C++17	100 / 100	401 ms	772 KiB

bosses

#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 5000;
vector<int> employees[MAX_N + 1];
bool vis[MAX_N + 1];
int depth[MAX_N + 1];

int main() {
    int n;

    cin >> n;
    for ( int u = 1; u <= n; u++ ) {
        int k;
        cin >> k;
        for ( int i = 0; i < k; i++ ) {
            int v;
            cin >> v;
            employees[v].push_back( u );
        }
    }

    int minCost = n * n;
    for ( int s = 1; s <= n; s++ ) {
        queue<int> q;

        for ( int v = 1; v <= n; v++ ) {
            depth[v] = 0;
            vis[v] = false;
        }

        int steps = 0;
        vis[s] = true;
        depth[s] = 1;
        q.push( s );
        while ( !q.empty() ) {
            int u = q.front();
            q.pop();
            steps++;

            for ( int v: employees[u] ) {
                if ( !vis[v] ) {
                    vis[v] = true;
                    depth[v] = depth[u] + 1;
                    q.push( v );
                }
            }
        }

        if ( steps < n )
            continue;
        
        int cost = 0;
        for ( int v = 1; v <= n; v++ )
            cost += depth[v];
        minCost = min( minCost, cost );
    }

    cout << minCost;

    return 0;
}

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