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 ans = 0;
    for (int i = 1; i <= N; i+=2) {
      if (countYakusu(i) == 8) {
        ans++;
      }
    }
    System.out.println(ans);
  }
  
  private static int countYakusu(int n) {
    int ret = 0;
    for (int i = 1; i <= n; i++) {
      if (n % i == 0) {
        ret++;
      }
    }
    return ret;
  }
}