// Problem#: 1144
// Author#: Reid Chan
#include <iostream>
using namespace std;
int main()
{
int height[10];
for (int i = 0; i < 10; ++i) {
cin >> height[i];
}
int get, count = 0;
cin >> get;
get += 30;
for (int i = 0; i < 10; ++i) {
if (get >= height[i]) {
count++;
}
}
cout << count << endl;
return 0;
}