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 {
  private static Scanner sc;

  public static void main(String[] args) {
    sc = new Scanner(System.in);
    new Main().solve();
  }


  private void solve() {
    int N = sc.nextInt();
    int num = 1;
    int ans = 0;
    while (num <= N) {
      int cnt = 0;
      for (int i = 1; i <= num; i += 2) {
        if (num % i == 0) cnt++;
      }
      if (cnt == 8) ans++;
      num++;
    }
    System.out.println(ans);
  }
}

