import java.util.Scanner;

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

    while (in.hasNext()) {
      int N = in.nextInt();
      int countEightDivisor = 0;

      for (int i = 1; i <= N; i += 2) {
        int divisorCount = 0;

        for (int d = 1; d <= i; ++d) {
          if (i % d == 0) {
            ++divisorCount;
          }
        }

        if (divisorCount == 8) {
          ++countEightDivisor;
        }
      }

      System.out.println(countEightDivisor);
    }
  }
}
/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