Submission #924997

#	Time	Username	Problem	Language	Result	Execution time	Memory
924997		NintsiChkhaidze	Bosses (BOI16_bosses)	C++17	100 / 100	438 ms	872 KiB

bosses

#include <bits/stdc++.h>
#define ll long long
#define s second
#define f first
#define pb push_back
#define pii pair <int,int>
#define left (h<<1),l,(l + r)/2
#define right ((h<<1)|1),(l + r)/2 + 1,r
#define int ll
using namespace std;

const int N = 5000 + 3;

int vis[N],dep[N],cnt[N];
vector <int> v[N];

signed main(){
	ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);

	int n;
	cin>>n;

	for (int i = 1; i <= n; i++){
		int k;
		cin>>k;

		for (int j= 1; j <= k; j++){
			int x;
			cin>>x;
			v[x].pb(i);
		}
	}

	int ans = 1e18;
	for (int root = 1; root <= n; root++){
		for (int i = 1;i <= n; i++)
			dep[i] = 0,cnt[i] = 0;
		queue <int> q;
		q.push(root);
		dep[root] = 1;

		int c=0;
		while(q.size()){
			int x = q.front(); q.pop();
			++c;
			for (int to: v[x]){
				if (!dep[to]) {
					dep[to] = dep[x] + 1;
					q.push(to);
				}
			}
		}
		if (c < n) continue;

		for(int i=1;i<=n;i++)
			cnt[dep[i]]++;

		int sum = n,cur = n;	
		for (int i = 1; i <= n; i++){
			cur -= cnt[i];
			sum += cur;
		}
		ans=min(ans,sum);
	}
	cout<<ans;
}

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