#include <bits/stdc++.h>
using namespace std;
int a[10 + 1]; 
int main() {
	int n = 10, h, cnt = 0;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
	}
	cin >> h;
	for (int i = 1; i <= n; i++) {
		if (h + 30 >= a[i]) {
			cnt++; 
		}
	}
	cout << cnt << endl;
	
	return 0;
}