#include<bits/stdc++.h>
using namespace std; 
int n;
string a[10005][10];
int main()
{
	freopen("p4.in","r",stdin);
	freopen("p4.out","w",stdout);
	cin >> n;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=4;j++)
		{
			cin >> a[i][j];
		}
	}
	cout << 0;
	return 0;
}