import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    try {
      int n = sc.nextInt();
      int ans = 0;
      for (int i = 1; i <= n; i++) {
        if (i % 2 == 0) continue;
        int cnt = 0;
        for (int j = 1; j <= i; j++) if (i % j == 0) cnt++;
        if (cnt == 8) ans++;
      }
      System.out.println(ans); 
    } finally {
      sc.close();
    }
  }
}

/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