#include <iostream>
using namespace std;
const int N = 10;
int a[N];
int main(){
    for(int i = 0; i < N; i ++ )    cin >> a[i];
    int can;    cin >> can;
    can += 30;
    int cnt = 0;
    for(int i = 0; i < N; i ++ ){
        if(a[i] <= can) cnt ++ ;
    }
    cout << cnt << endl;
    return 0;
}