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();

    int cou = 0;
    int ans = 0;
    for(int i=1; i<=N; i+=2) {    
    	for(int j=1; j<=N; j++) {
    		if(i%j== 0) {
    			cou++;
    		}
    	}
    	if(cou==8) {
    		ans++;
     }
    	cou = 0;
    }
    	System.out.println(ans);
      }
}

