import java.util.Scanner; public class Main2 {

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);

    //定义存储苹果高度的数组
    int []hewightArr = new int[10];
    for (int i = 0; i < 10; i++) {
        hewightArr[i] = sc.nextInt();
    }

    //定义触及到的高度
    int hewight = sc.nextInt() + 30;

    //定义可以摸到的苹果数量
    int count = 0;
    for (int i = 0; i < 10; i++) {
        if (hewightArr[i] <= hewight) {
            count++;
        }
    }

    System.out.println(count);
}

}