Submission #894714

#	Time	Username	Problem	Language	Result	Execution time	Memory
894714		Pekiban	Bosses (BOI16_bosses)	C++17	100 / 100	451 ms	788 KiB

bosses

#include <bits/stdc++.h>

using namespace std;

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector<int> v[n];
    for (int i = 0; i < n; ++i) {
        int k;
        cin >> k;
        while (k--) {
            int u;
            cin >> u;
            u--;
            v[u].push_back(i);
        }
    }
    bitset<5000> bs;
    bs.reset();
    long long ans = 1e9;
    int dep[n];
    for (int i = 0; i < n; ++i) {
        bs.reset();
        queue<int> q;
        q.push(i);
        dep[i] = 1;
        long long sum = 1;
        bs[i] = 1;
        while (!q.empty()) {
            int s = q.front();
            q.pop();
            for (auto u : v[s]) {
                if (bs[u] == 0) {
                    bs[u] = 1;
                    q.push(u);
                    dep[u] = dep[s] + 1;
                    sum += dep[u];
                }
            }
        }
        for (int i = 0; i < n; ++i) {
            if (bs[i] == 0) {
                sum += 1e9;
            }
        }
        ans = min(ans, sum);
    }
    cout << ans << '\n';
}

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