import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        int result = 0;
        for (int i = 1; i <= n; i = i+2) {
            int divisor = divisorCounter(i);
            if (divisor == 8) {
                result++;
            }
        }
        System.out.println(result);
    }

    private static int divisorCounter(int x) {
        int counter = 0;
        for (int i = 1; i <= x; i++) {
            if (x%i == 0) {
                counter++;
            }
        }
        return counter;
    }
}
/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