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.*;
import java.io.*;

class Main {
  public static void main(String[] args) throws Exception{
    try (Scanner sc = new Scanner(System.in)){
      int N = sc.nextInt();
      int c = 0;
      for (int i = 1; i <= N; i=i+2) {
        int count = 0;
        for (int j = 1; j <= N; j++) {
          if (i % j == 0) count++;
        }
        if (count == 8) c++;
      }
      System.out.println(c);
    }
  }
}
