Submission #447321

#	Time	Username	Problem	Language	Result	Execution time	Memory
447321		phathnv	Bosses (BOI16_bosses)	C++11	100 / 100	753 ms	656 KiB

bosses

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

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector<vector<int>> adj(n, vector<int>());
    for (int i = 0; i < n; i++) {
        int k;
        cin >> k;
        while (k--) {
            int p;
            cin >> p;
            adj[--p].push_back(i);
        }
    }
    int res = 1e9;
    for (int r = 0; r < n; r++) {
        vector<int> d(n, -1);
        queue<int> qu;
        d[r] = 1;
        qu.push(r);
        while (!qu.empty()) {
            int u = qu.front();
            qu.pop();
            for (int v : adj[u])
                if (d[v] == -1) {
                    d[v] = d[u] + 1;
                    qu.push(v);
                }
        }
        if (*min_element(d.begin(), d.end()) != -1)
            res = min(res, accumulate(d.begin(), d.end(), 0));
    }
    cout << res;
    return 0;
}

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