import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        //题目中已经指明了树上刚好十个苹果
        int[] arr = new int[10];
        for(int i = 0;i < 10;i++){
            arr[i] = scanner.nextInt();
        }
        int height = scanner.nextInt();
        int res = 0;
        for(int i = 0 ;i < 10;i++){
            if(arr[i] <= height + 30){
                res++;
            }
        }
        System.out.println(res);
    }
}