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;
    int ans=0;
    for(int i=1;i<=n;i++){
      count=0;
      for(int s=i;s>=1;s--){
        if(i%s==0){
          count++;
        }
      }
      if(i%2!=0 && count==8){
        ans++;
      }
    }
    System.out.println(ans);

	}
}
