import java.util.*;

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

    int ans = 0;
    for (int i = 1; i <= N; i+=2) {
      if (countYakusu(i) == 8) {
        ans++;
      }
    }
    System.out.println(ans);
  }
  
  private static int countYakusu(int n) {
    int ret = 0;
    for (int i = 1; i*i <= n; i++) {
      if (n % i == 0) {
        if (n / i == i) {
          ret += 1;
        } else {
          ret += 2;
        }
      }
    }
    return ret;
  }
}
/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