제출 #676114

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
676114		sudheerays123	Bosses (BOI16_bosses)	C++17	100 / 100	1350 ms	1016 KiB

bosses

#include<bits/stdc++.h>
using namespace std;
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define ll long long int
const ll N = 5000+5 , INF = 1e18 , MOD = 1e9+7;

vector<ll> ssize(N);
vector<ll> adj2[N];

void dfs(ll s){

	ssize[s] = 1;
	for(auto u : adj2[s]){
		dfs(u);
		ssize[s] += ssize[u];
	}
}

void solve(){

	ll n;
	cin >> n;

	vector<ll> adj1[N];

	for(ll i = 1; i <= n; i++){
		ll x;
		cin >> x;

		while(x--){
			ll a;
			cin >> a;

			adj1[a].push_back(i);
		}
	}

	ll ans = INF;

	for(ll root = 1; root <= n; root++){

		vector<ll> depth(n+5,-1);
		for(ll i = 1; i <= n; i++) adj2[i].clear();

		depth[root] = 1;

		queue<ll> q;
		q.push(root);
		ll cnt = 1;

		while(q.size()){
			ll a = q.front();
			q.pop();

			for(auto u : adj1[a]){
				if(depth[u] == -1){
					depth[u] = depth[a]+1;
					q.push(u);
					adj2[a].push_back(u);
					cnt++;
				}
			}
		}

		ll cost = 0;
		dfs(root);
		for(ll i = 1; i <= n; i++) cost += ssize[i];

		if(cnt == n) ans = min(ans,cost);
	}

	cout << ans;
}

int main(){

	fast;

	ll tc = 1;
	// cin >> tc;
	while(tc--) solve();

	return 0;
}

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