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 co = 0;
        int yakusu = 0;
      
      for(int i=1;i<=N;i++){
        co = 0;
        if(i%2!=0){
          for(int j=1;j<=i;j++){
            if(i%j==0){co++;}
          }
          if(co==8){yakusu++;}
        }
      }
      System.out.print(yakusu);
    }
}