#include <bits/stdc++.h>

using namespace std;

int a[15];

int main() {
    int b, B;
    for (int i = 1; i <= 10; i++) {
        cin >> a[i];
    }
    cin >> b;
    B = b + 30;
    int c = 0;
    for (int i = 1; i <= 10; i++) {
        if (a[i] <= B)
            c++;
    }
    cout << c;
    return 0;
}