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 {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    Main solution = new Main();
    
    System.out.println(solution.solve(N));
  }
  
  int solve(int N) {
    int ret = 0;
    for(int i=1; i<=N; i++) {
      if(i%2==0) continue;
      int count=0;
      for(int j=1; j<=i; j++) {
        if(i%j==0) count++;
      }
      if(count==8) ret++;
    }
    return ret;
  }
}
