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