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 scan = new Scanner(System.in);
	
	int n = scan.nextInt();
	
	int ans = 0;
	for(int i = 1; i <= n; i += 2){
	    int count = 0;
	    for(int j = i; j >= 1; j--){
		if(i % j == 0){
		    count++;
		}
	    }
	    if(count == 8){
		ans++;
	    }
	}
	
	System.out.println(ans);
    }
}
