Submission #947569

#	Time	Username	Problem	Language	Result	Execution time	Memory
947569		blacktulip	Bosses (BOI16_bosses)	C++17	100 / 100	943 ms	1144 KiB

bosses

#include <bits/stdc++.h>

using namespace std;

typedef long long lo;

#define fi first
#define se second
#define endl "\n"
#define int long long
#define pb push_back
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)
#define _ << " " <<

const lo inf = 1000000000;
const lo li = 5005;
const lo mod = 1000000007;

int n,m,a[li],k,flag,t,dp[li],vis[li];
int cev;
string s;
vector<int> v[li],vv[li];

inline void dfs(int node,int ata){
	dp[node]=1;
	for(auto go:vv[node]){
		if(go==ata)continue;
		dfs(go,node);
		dp[node]+=dp[go];
	}
	//~ cout<<node _ dp[node]<<endl;
}

int32_t main(void){
	fio();
	cin>>n;
	FOR{
		cin>>k;
		for(int j=1;j<=k;j++){
			int x;
			cin>>x;
			v[x].pb(i);
		}
	}
	cev=1000000000000000000;
	FOR{
		queue<int> q;
		q.push(i);
		memset(vis,0,sizeof(vis));
		for(int j=1;j<=n;j++)vv[j].clear();
		int say=0;
		while(q.size()){
			say++;
			int node=q.front();
			q.pop();
			vis[node]=1;
			for(auto go:v[node]){
				if(vis[go])continue;
				vis[go]=1;
				vv[node].pb(go);
				q.push(go);
			}
		}
		if(say!=n){continue;}
		int sum=0;
		dfs(i,0);
		for(int j=1;j<=n;j++)sum+=dp[j];
		cev=min(cev,sum);
	}
	cout<<cev<<endl;
	return 0;
}

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