#include <bits/stdc++.h>
using namespace std;
int main() {
	int i,n,h=0;
	int a[10];
	for(i=0;i<10;i++){
		cin>>a[i];
	} 
	cin>>n;
	for(i=0;i<10;i++){
		if(n+30>=a[i]){
			h++;	
		}
	}
	cout<<h;
}
/**************************************************************
	Problem: 1388
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/