#include <iostream>
using namespace std;
int apple[10];
int tall;
int main()
{
for (int i = 0; i < 10; i ++ ) cin >> apple[i]; //输入十个苹果高度和身高
cin >> tall;
int res = 0;
for (int i = 0; i < 10; i ++ )
if (apple[i] <= tall + 30) //苹果高度小于等于身高加凳子就能摘到
res ++ ;
cout << res << endl;
return 0;
}