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){
        int count=0;
        Scanner sc=new Scanner(System.in);
        int N=sc.nextInt();
        if(N<105)count=0;
        else if(N<135) count=1;
        else if(N<165)count=2;
        else if(N<189)count=3;
        else if(N<195)count=4;
        else count=5;
        System.out.println(count);
    }
}