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();
		sc.close();
			//105 135 165 195
			if(n>=195)System.out.println(5);
			else if(n>=189)System.out.println(4);
			else if(n>=165)System.out.println(3);
			else if(n>=135)System.out.println(2);
			else if(n>=105)System.out.println(1);
			else System.out.println(0);
	}
}
