include <bits/stdc++.h>

using namespace std;

int main () {

int a, b, c, d, e, f, g, h, m, j, q, i;
cin >> a >>  b >> c >>  d >>  e >> f >>  g >> h >> m >>
    j ;
cin >> q;
q += 30;
i = 0;
if (q >= a)
	i += 1;
if (q >= b)
	i += 1;
if (q >= c)
	i += 1;
if (q >= d)
	i += 1;
if (q >= e)
	i += 1;
if (q >= f)
	i += 1;
if (q >= g)
	i += 1;
if (q >= h)
	i += 1;
if (q >= m)
	i += 1;
if (q >= j)
i += 1;
cout << i;

return 0;

}