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();
		int ans = 0;
		int count;
		for(int i = 3;i <= n; i += 2){
			count = 0;
			for(int j = 1;j <= n/2+1; j++){
				if(i%j==0) count++;
			}
			count++;
			if(count == 8) ans++;
		}
		System.out.println(ans);
	}
}