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.*;
class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    int count=0;
    for(int i=1;i<=n;i+=2){
      int cou=1;
      for(int j=3;j<=i;j+=2){
        if(i%j==0)cou++;
      }
      if(cou==8)count++;
    }
    System.out.println(count);
  }
}