import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] arr = new int[15];
        //输入第一行十个数据
        for (int i = 0; i < arr.length; i++) {
            arr[i] = sc.nextInt();
        }
        //输入第二行一个数据
        int height = sc.nextInt();
            
        int total = height + 30;
        
        int n = 0;

        for (int i = 0; i < arr.length; i++) {
            if(arr[i] < total){
                n++;
            }
        }
        System.out.println(n);
    }
}