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 a =0;
		int counter = 0;

		for (int n=1; n<=N;n=n+2){
			a = 0;
			for ( int j=1;j<=n;++j){
				if (n%j == 0) ++a;
			}
			if (a == 8) ++ counter;
		}

		System.out.println(counter);

	}

}