#include <bits/stdc++.h>

using namespace std;

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