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) {
		Scanner sc=new Scanner(System.in);
		int n;
		n=sc.nextInt();
		int c=0;
		for(int i=1;i<=n;i++) {
			if(i%2==0)
				continue;
			if(div(i)==8)
				c++;
		}
		System.out.println(c);
	}
	
	public static int div(int n) {
		int cnt=0;
		for(int i=1;i<=n;i++) {
			if(n%i==0)
				cnt++;
		}
		return cnt;
	}
}