import java.util.*;

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

        int val1 = sc.nextInt();

        int count = 0;
        for (int i = 9; i <= val1; i = i + 2) {
            int temp = 0;
            for (int n = 1; n <= i; n++) {
                if ((i % n) == 0) {
                    temp++;
                }
            }
            if (temp == 8) {
                count++;
            }
        }
        System.out.println(count);
    }
}
/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