Submission #1065900

#	Time	Username	Problem	Language	Result	Execution time	Memory
1065900		vjudge1	Bosses (BOI16_bosses)	C++17	100 / 100	518 ms	604 KiB

bosses

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define db double
#define ld long double
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define fi first
#define se second
#define debug(x) cout << #x << " => " << x << "\n"
#define all(x) x.begin(),x.end()

vector<int> adj[5010];
int ans=1e9;
int d[5010];

void bfs(int x,int n)
{
	int cnt=0;
	memset(d,-1,sizeof(d));
	queue<pii> q;
	q.push({x,1});
	d[x]=0;
	int num=0;
	while(!q.empty())
	{
		int u=q.front().fi,de=q.front().se;
		q.pop();
		cnt+=de;
		num++;
		for(auto i : adj[u])
		{
			if(d[i]==-1)
			{
				d[i]=de+1;
				q.push({i,d[i]});
			}
		}
	}
	if(num==n) ans=min(ans,cnt);
}

int main()
{
	ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
	int n;cin>>n;
	for(int i=1;i<=n;i++)
	{
		int x;cin>>x;
		while(x--)
		{
			int j;cin>>j;
			adj[j].pb(i);
		}
	}
	for(int i=1;i<=n;i++) bfs(i,n);
	cout<<ans;
	return 0;
}

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