import java.util.Scanner;

public class Main {

  public static void main(String[] args) {

    Scanner scan = new Scanner(System.in);

    int n = scan.nextInt();
    int ans = 0;

    for (int i = 1; i <= n; i += 2) {
      int cnt = 0;
      for (int j = 1; (j <= i) && (cnt <= 8); j++) {
        if (i % j == 0) {
          cnt++;
        }
      }
      if (cnt == 8) {
        ans++;
      }
    }

    System.out.println(ans);

  }

}
/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