#include<bits/stdc++.h>
using namespace std;
vector<vector<int> > v(100000); 
int sun[10000000];
    
//1  2 3 
//2  4
//3  
//4  5
//5



int n,c,x,ansmax=0,ans=0; 
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>c;//获取i的儿子的数量x
		for(int j=0;j<=c-1;j++){
			cin>>x;
			v[i].push_back(x);
//			cout<<v[i][j]<<" "; 
		}
//		cout<<endl;
		
	}	 
	for(int i=1;i<=n;i++){
		if(v[i].size()>0) 
		for(int j=0;j<=v[i].size()-1;j++){
			sun[i]+= v[v[i][j]].size();
		} 
	}
	for(int i=1;i<=n;i++){
		//cout<<sun[i]<<" ";
		if(sun[i]>ansmax){
			ansmax=sun[i];
			ans=i;
		}
	} 
	cout<<ans;
	return 0;
}

/**************************************************************
	Problem: 1775
	User: admin
	Language: C++
	Result: Runtime Error
****************************************************************/