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 {

	@SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		
		int ans=0;
		for(int i=1;i<=n;i+=2){
			int cnt=0;
			for(int j=i;j>0;j--){
				if(i%j==0)cnt++;
			}
			if(cnt==8)ans++;
		}
		
		System.out.println(ans);
	}
}
