Submission #164149

#	Time	Username	Problem	Language	Result	Execution time	Memory
164149		kostia244	Bosses (BOI16_bosses)	C++17	100 / 100	936 ms	888 KiB

bosses

//#define _GLIBCXX_DEBUG
#include<bits/stdc++.h>
#define pb push_back
using namespace std;
using ll = long long;
using vi = vector<ll>;
using vvi = vector<vi>;
int n, ans = 1e9, t = 0;
vvi g;
int d[5050], q[5050], fi, en;
int go(int v) {
	memset(d, -1, sizeof d);
	fi = 0;
	en = 1;
	q[0] = v;
	d[v]=1;
	while(fi < en) {
		int u = q[fi++];
		for(auto v : g[u]) {
			if(d[v]!=-1) continue;
			d[v] = d[u]+1;
			q[en++] = v;
		}
	}
	ll ans = 0;
	for(int i = 1; i <= n; i++)
		if(d[i]==-1) return 1e9;
		else ans += d[i];
	return ans;
}
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin >> n;
	g.resize(n+1);
	for(int k, t, i = 1; i <= n; i++) {
		cin >> k;
		while(k--) cin >> t, g[t].pb(i);
	}
	for(int i = 1; i <= n; i++) {
		ans = min(ans, go(i));
	}
	cout << ans << "\n";
}

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