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();
		
		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);
		
		sc.close();
	}

}
