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.*;
public class Main {

	public static void main(String[] args) {
	Scanner sc = new Scanner(System.in);
	int N = sc.nextInt();
	int count =0;
	int ans =0;
    for(int i=1;i<=N;i++) {
    	if(i%2==1) {
    		for(int j=1;j<=i;j++) {
    			if(i%j==0) {
    				count++;}
    			}
    		if(count==8) {
    			ans++;
    		}
    		else {
    			count=0;
    		}
    }
	}
    System.out.println(ans);
	}
	}
