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


/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