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;

class Main{
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt(),s=0,t,i,j;
		sc.close();
		for(i=1;i<=n;i+=2) {
			t=0;
			for(j=1;j<=i;j++) if(i%j==0) t++;
			if(t==8) s++;
		}
		System.out.print(s);
	}
}