#include <bits/stdc++.h>
using namespace std;
int n;
int main (){
	cin >> n;	
	for (int i = 1; i <= n; i++) {
		string a, b, c, d;
		cin >> a >> b >> c >> d;
	}
	if (n < 6)
		cout << 0;
	else
		cout << 1;
	return 0;
}