#include<iostream>
#include<vector>

using namespace std;

int main() {
	
	vector<int> q;
	for (int i = 0; i < 10; i ++ ) {
		int x;
		cin >> x;
		q.push_back(x);
	}
	
	int n;
	cin >> n;
	
	int cnt = 0;
	for (auto x : q) {
		if (n + 30 >= x)
			cnt ++ ;
	}
	
	cout << cnt << endl;
	
	return 0;
}