#include <bits/stdc++.h>
using namespace std;
int n,l[10010],d[10010];
vector<int> a[10010];
struct point{int x;int step;};
queue<point>q;
int ans = 0;
void out(){
for (int i = 1;i<=n;i++){
	cout<<i<<"->";
	for (int j = 0;j<a[i].size();j++) cout<<a[i][j]<<" ";
	cout<<endl; 
	}
	return;
}
int main(){
	cin>>n;
	for (int i = 1;i<=n;i++){
		int p,c;cin>>p;cin>>l[p];
		while(cin>>c && c!=0) a[c].push_back(p),d[p]++;
	}
//	out();
	for (int i = 1;i<=n;i++) if (d[i]==0) q.push({i,1});
	int ml = 0,sp = 1;
	while(!q.empty()){
		point now= q.front();q.pop();	
//		cout<<now.x<<":"<<now.step<<":"<<l[now.x]<<"->"<<endl;
		if (now.step!=sp) ans+=ml,sp=now.step,ml=0;
		ml = max(ml,l[now.x]);
		for (int i = 0;i<a[now.x].size();i++){
			int ee = a[now.x][i];
//			cout<<ee;
			if (--d[ee] == 0) q.push({ee,now.step+1}); 
		}
//		cout<<ml<<endl;
	}
	ans+=ml;
	cout<<ans;
	return 0;
}