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 = sc.nextInt();
    sc.close();
    int nn = 0;
    int ans = 0;
    for(int i=1;i<=n;i++) {
    	for(int j=1;j<=n;j++) {
    		if((i%j==0)&&(i%2==1)) {
    			nn++;
    		}
    	}
    	if(nn == 8) {
    		ans++;
    	}
    	nn = 0;
    }
    System.out.println(ans);
  }
}