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

int main(){
	int n;
	cin>>n;
	for(int i = 0;i < n;i++){
		string s1, s2, s3, s4;
		cin>>s1>>s2>>s3>>s4;
	}
	if(n < 6) cout<<0<<endl; 
	cout<<1<<endl;
	return 0;
}