#include <bits/stdc++.h>

using namespace std;
const int N = 20;
int a[N];

int main() {
    int b, B;
    for (int i = 1; i <= 10; i++)  cin >> a[i];
    cin >> b;//陶陶把手伸直的时候能够达到的最大高度。
    B = b + 30;
    int cnt = 0;
    for (int i = 1; i <= 10; i++)
        if (a[i] <= B) cnt++;

    cout << cnt;
    return 0;
}