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