Submission #727994

#	Time	Username	Problem	Language	Result	Execution time	Memory
727994		WonderfulWhale	Bosses (BOI16_bosses)	C++17	100 / 100	646 ms	708 KiB

bosses

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

#define int int64_t
#define pb push_back
#define st first
#define nd second
#define pii pair<int, int>
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()

vector<int> G[5009];
bool vis[5009];
int d[5009];
int sum;
int cnt;

void bfs(int x) {
	queue<int> Q;
	Q.push(x);
	sum = cnt = 0;
	d[x] = 1;
	memset(vis, 0, sizeof(vis));
	vis[x] = true;
	while(sz(Q)) {
		int y = Q.front();
		Q.pop();
		cnt++;
		sum += d[y];
		for(int z:G[y]) {
			if(!vis[z]) {
				d[z] = d[y]+1;
				vis[z] = true;
				Q.push(z);
			}
		}
	}
}

int32_t main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	int n;
	cin >> n;
	for(int i=1;i<=n;i++) {
		int k;
		cin >> k;
		for(int j=0;j<k;j++) {
			int x;
			cin >> x;
			G[x].pb(i);
		}
	}
	int res = 1e18;
	for(int i=1;i<=n;i++) {
		bfs(i);
		if(cnt==n) res = min(res, sum);
	}
	cout << res << "\n";
}

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