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();
  if(n < 105)System.out.println("0");
  else if(n <135)System.out.println("1");
  else if(n <165)System.out.println("2");
  else if(n <189)System.out.println("3");
  else if(n <195)System.out.println("4");
  else System.out.println("5");
}}