Submission #733491

#	Time	Username	Problem	Language	Result	Execution time	Memory
733491		JellyTheOctopus	Bosses (BOI16_bosses)	C++17	0 / 100	1 ms	340 KiB

bosses

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

int N;
vector<int> adjList[5001];

int bfs(int root) {
	vector<bool> seen(N+1);
	vector<int> depth(N+1);
	queue<int> q; // node, depth
	q.push(root); // starting depth at one
	depth[root] = 1;
	int ans = 0;
	while (!q.empty()) {
		int u = q.front();
		q.pop();
		if (!seen[u]) {
			seen[u] = true;
			ans += depth[u];
			for (auto v: adjList[u]) {
				if (!seen[v]) {
					depth[v] = depth[u]+1;
					q.push(v);
				}
			}
		}
	}
	return ans;
}

int main() {
	cin >> N;
	for (int v = 1; v <= N; v++) {
		int k;
		cin >> k;
		for (int i = 0; i < k; i++) {
			int u;
			cin >> u;
			adjList[u].push_back(v);
		}
	}
	int ans = INT_MAX;
	for (int i = 1; i <= N; i++) {
		ans = min(ans, bfs(i));
	}
	cout << ans << "\n";
}

• Subtask 1: 0 / 22
• Subtask 2: 0 / 45
• Subtask 3: 0 / 33