Submission #936316

#	Time	Username	Problem	Language	Result	Execution time	Memory
936316		wateronenn	Bosses (BOI16_bosses)	C++14	100 / 100	396 ms	3156 KiB

bosses

#include<bits/stdc++.h>
#define pii pair<int,int>
#define f first
#define s second
#define ll long long
using namespace std;

const int N = 1e5+9;
vector<int> g[N];

int main(){
	cin.tie(0)->sync_with_stdio(false);
	int n,m;
	cin>>n;
	for(int i=1;i<=n;i++){
		int k;
		cin>>k;
		for(int j=1;j<=k;j++){
			cin>>m;
			g[m].push_back(i);
		}
	}
	ll sum = LLONG_MAX;
	
	for(int i=1;i<=n;i++){
		bool visit[n+1]={0};
		memset(visit,0,sizeof(visit));
		visit[i] = true;
		queue<pii> s;
		s.push({i,1});
		ll nub = 1;
		int cnt = 1; //count node
		while(!s.empty()){
			int u = s.front().f;
			int w = s.front().s;
		//	cout<<u<<","<<w<<"* ";
			s.pop();
			for(auto v:g[u]){
				if(visit[v]) continue;
				visit[v] = true;
				cnt++;
				nub+=(w+1);
				s.push({v,w+1});
			}
		}
	//	cout<<nub<<" "<<cnt<<endl;
		if(cnt<n) continue;
		sum = min(sum,nub);
	
	}
	cout<<sum;
	
	return 0;
}
/*

4
1 4
3 1 3 4
2 1 2
1 3

4
1 2
0
1 4
0 

*/

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