import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    Main solution = new Main();
    
    System.out.println(solution.solve(N));
  }
  
  int solve(int N) {
    int ret = 0;
    for(int i=1; i<=N; i++) {
      if(i%2==0) continue;
      int count=0;
      for(int j=1; j<=i; j++) {
        if(i%j==0) count++;
      }
      if(count==8) ret++;
    }
    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