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 static java.lang.System.*;
import static java.lang.Math.*;
public class Main {
public static void main(String[] args){
Scanner sc = new Scanner(in);
int ans=0;
    int n = Integer.parseInt(sc.next());
    for (int i = 1; i <= n; i++) {
        if(i%2!=0){
        int count=0;
        for (int j = 1; j <= i; j++) {
            if(i%j==0)count++;
        }
        if(count==8)ans++;
        }
    }
    out.println(ans);
}}