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();

		int ans = 0;


		if(N>=195) ans = 5;

		else if(N>=189) ans = 4;

		else if(N>=165) ans = 3;

		else if(N>=135) ans = 2;

		else if(N>=105) ans = 1;

		System.out.println(ans);

	}

}
