Submission #733487

#	Time	Username	Problem	Language	Result	Execution time	Memory
733487		JellyTheOctopus	Bosses (BOI16_bosses)	C++17	0 / 100	0 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);
	queue<pair<int, int>> q; // node, depth
	q.push({root, 1}); // starting depth at one
	seen[root] = true;
	int ans = 0;
	while (!q.empty()) {
		pair<int, int> cur = q.front();
		int u = cur.first;
		int depth = cur.second;
		q.pop();
		ans += depth;
		for (auto v: adjList[u]) {
			if (!seen[v]) {
				q.push({v, depth+1});
				seen[v] = true;
			}
		}
	}
	return ans;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	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