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 = Integer.parseInt(sc.nextLine());
    int ans = 0;
    for(int i = 1; i <= N; i++) {
      int count = 0;
      if(i % 2 == 0) { continue; }
      for(int j = 1; j <= i; j++) {
        if(i % j == 0) {
          count++;
        }
      }
      if(count == 8) { ans++; }
    }
    System.out.println(ans);
  }
}