import java.util.Scanner;

public class Main {

    private static Scanner sc = new Scanner(System.in);

    public static void main(String args[]) {

        int n = sc.nextInt();


        int count = 0;
        for (int i=105; i <= n; i += 2) {
            if (numOfDivisors(i) == 8)
                count++;
        }

        System.out.println(count);


    }

    private static int numOfDivisors(int n) {
        int c = 0;
        for (int i=1; i <= n; i++) {
            if (n % i == 0)
                c++;
        }
        return c;
    }

}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz