Submission #1001460

#	Time	Username	Problem	Language	Result	Execution time	Memory
1001460		vjudge3	Bosses (BOI16_bosses)	C++17	100 / 100	601 ms	812 KiB

bosses

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

vector<int> g[5005];
int n;

ll root (int s) {
	vector<ll> dist (5005, 1e9);
	dist[s] = 1;
	ll res = 0;
	queue<ll> q;
	q.push(s);
	while (!q.empty()) {
		int u = q.front();
		q.pop();
		for (auto& v : g[u]) if (dist[u] + 1 < dist[v]) {
			dist[v] = dist[u]+1;
			q.push(v);
		}
	}
	for (int i = 1; i <= n; i++) res += dist[i];
	return res;
}

int main () {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> n;
	for (int i = 1; i <= n; i++) {
		int c;
		cin >> c;
		while (c--) {
			int u;
			cin >> u;
			g[u].push_back(i);
		}
	}
	ll ans = 1e18;
	for (int i = 1; i <= n; i++) ans = min(ans, root(i));
	cout << ans << '\n';
	return 0;
}

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