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.*;
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);
 }
}