Submission #695232

#	Time	Username	Problem	Language	Result	Execution time	Memory
695232		Ahmed_Solyman	Bosses (BOI16_bosses)	C++14	100 / 100	1489 ms	884 KiB

bosses

#include<bits/stdc++.h>
using namespace std;
vector<int>adj[5005];
vector<long long>s(5005);
vector<bool>vis(5005);
vector<int>g[5005];
void dfs1(int n){
	queue<int>q;
	q.push(n);
	while(q.size()){
		int x=q.front();
		q.pop();
		vis[x]=1;
		for(auto i:adj[x]){
			if(!vis[i]){
				g[x].push_back(i);
				vis[i]=1;
				q.push(i);
			}
		}
	}
}
long long dfs2(int n){
	if(s[n]){
		return s[n];
	}
	long long sum=1;
	for(auto i:g[n]){
		dfs2(i);
		sum+=s[i];
	}
	return s[n]=sum;
}
int main(){
	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;
			adj[x].push_back(i);
		}
	}
	long long ans=4e18;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			vis[j]=0;
			s[j]=0;
			g[j].clear();
		}
		dfs1(i);
		long long sum=0;
		bool valid=1;
		for(int j=1;j<=n;j++){
			if(!vis[j]){
				valid=0;
			}
		}
		if(valid){
			for(int j=1;j<=n;j++){
				sum+=dfs2(j);
			}
			ans=min(ans,sum);
		}
	}
	if(ans==4e18)while(1)cout<<"g";
	cout<<ans<<endl;
}

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