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