The number 105 is quite special - it is odd but still it has eight divisors. Now, your task is this: how many odd numbers with exactly eight positive divisors are there between 1 and N (inclusive)?

Constraints

* N is an integer between 1 and 200 (inclusive).

Input

Input is given from Standard Input in the following format:


N


Output

Print the count.

Examples

Input

105


Output

1


Input

7


Output

0
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        sc.close();
        if(N < 105) System.out.println(0);
        else if(N < 135) System.out.println(1);
        else if(N < 165) System.out.println(2);
        else if(N < 189) System.out.println(3);
        else if(N < 195) System.out.println(4);
        else System.out.println(5);

    }

}
