Submission #951553

#	Time	Username	Problem	Language	Result	Execution time	Memory
951553		MuhammadSaram	Bosses (BOI16_bosses)	C++17	0 / 100	1 ms	604 KiB

bosses

#include <bits/stdc++.h>

using namespace std;

const int M = 5000;

vector<int> nei[M],chi[M];
bool vis[M];
int subt[M],cst;

void dfs(int u)
{
	subt[u]=1;
	for (int i:chi[u])
	{
		dfs(i);
		subt[u]+=subt[i];
	}
	cst+=subt[u];
}

void bfs(int v)
{
	vis[v]=true;
	queue<int> q;
	q.push(v);
	while (!q.empty())
	{
		int x=q.front();
		q.pop();
		for (int i:nei[x])
			if (!vis[i])
			{
				chi[x].push_back(i);
				q.push(i);
				vis[i]=true;
			}
	}
	dfs(v);
}

int main()
{
	int n;
	cin>>n;
	for (int i=0;i<n;i++)
	{
		int k;
		cin>>k;
		for (int j=0;j<k;j++)
		{
			int x;
			cin>>x;
			x--;
			nei[x].push_back(i);
		}
	}
	int ans=n*(n+1)/2;
	for (int i=0;i<n;i++)
	{
		bfs(i);
		ans=min(ans,cst);
		cst=0;
		for (int j=0;j<n;j++)
		{
			vis[j]=false;
			chi[j].clear();
		}
	}
	cout<<ans<<endl;
	
	return 0;
}

• Subtask 1: 0 / 22
• Subtask 2: 0 / 45
• Subtask 3: 0 / 33