Submission #857844

#	Time	Username	Problem	Language	Result	Execution time	Memory
857844		vjudge1	Bosses (BOI16_bosses)	C++17	100 / 100	408 ms	1028 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
const int mxn=5e3+5;
int n,ans[mxn],dis[mxn],sum;
vector<int>v[mxn];
int main(){
	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].push_back(i);
		}
	}
	int d=1e9;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++)dis[j]=0;
		sum=0;
		dis[i]=1;
		queue<int>q;
		q.push(i);
		while(q.size()){
			int x=q.front();
			ans[i]+=dis[x];
			sum++;
			q.pop();
			for(auto j:v[x]){
				if(dis[j]==0)dis[j]=dis[x]+1,q.push(j);
			}
		}
		if(sum<n)ans[i]=1e9;
		
		d=min(ans[i],d);
	}
	cout<<d<<endl;
}

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