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.math.BigDecimal;
import java.math.MathContext;
import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int a[] = new int[]{105,135,165,189,195};
        int n = scanner.nextInt();
        int k = 0;
        for (int b:a){
            if(b <= n)++k;
        }
        System.out.println(k);
    }

}
