import java.util.Arrays;
import java.util.*;
public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
      int n = sc.nextInt();
      int i,m;
      int count = 0;
      int total = 0;
      for(i=1;i<=n;i+=2,count=0){
        for(m=1;m<=i;m++){
          if(i%m==0){
            count++;
          }
        }
        if(count==8){
          total++;
        }
      }
      
      System.out.println(total);
  }
}

/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