Submission #46551

#	Time	Username	Problem	Language	Result	Execution time	Memory
46551		ista2000	Bosses (BOI16_bosses)	C++17	100 / 100	885 ms	1192 KiB

bosses

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

vector< vector<int> > v;
int n;

int bfs(int r)
{
	queue<int> q;
	q.push(r);
	vector<int> a(n);
	vector<int> vis(n);
	vis[r] = 1;
	a[r] = 1;
	while(!q.empty())
	{
		int cur = q.front();
		q.pop();
		for(int i: v[cur])
		{
			if(!vis[i])
			{
				vis[i] = 1;
				a[i] += a[cur]+1;
				q.push(i);
			}
		}
	}
	for(int i = 0;i<n;i++)
		if(!vis[i])
			return INT_MAX;
	return accumulate(a.begin(), a.end(), 0ll);
}

#undef int
int main()
{
#define int long long int
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	cin>>n;
	v.resize(n);
	for(int i = 0;i<n;i++)
	{
		int k;
		cin>>k;
		for(int j = 0;j<k;j++)
		{
			int x;
			cin>>x;
			x--;
			v[x].push_back(i);
		}
	}
	int ans = INT_MAX;
	for(int i = 0;i<n;i++)
		ans = min(ans, bfs(i));
	cout<<ans<<endl;

	return 0;
}

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