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)throws Exception{
		Scanner stdIn=new Scanner(System.in);
		int N=stdIn.nextInt();
		int ans=0;
		for(int i=105;i<=N;i+=2){
			int a=0;
			for(int j=1;j<=i;j++){
				if(i%j==0)
					a++;
			}
			if(a==8)
				ans++;
		}
		System.out.println(ans);
	}
}
