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();
                int yono = 0;
                if(n >= 165) yono++;
                if(n >= 105) yono++;
                if(n >= 195) yono++;
                if(n >= 135) yono++;
                if(n >= 189) yono++;
                sc.close();
                System.out.println(yono);
        }
}
//計算ミスしていました、悲しい