source_code: 
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.Scanner;
  
  /*
   * To change this template, choose Tools | Templates
   * and open the template in the editor.
   */
  
  /**
   *
   * @author NAO93
   */
  public class a {
      public static void main(String[] args) {
          Scanner in = new  Scanner(System.in);
          int n = in.nextInt();
          long k = in.nextLong();
          Long []a = new Long[n];
          for (int i = 0; i<n; i++)
              a[i] = in.nextLong();
          HashSet<Long> hash = new HashSet<Long>();
          Arrays.sort(a);
          for (int i = 0; i<n; i++)
              if (!hash.contains(a[i])){
                  hash.add(a[i] * k);
              }
          System.out.println(hash.size());
      }
  
  }
  
  	 		 			 	 	 	   		   				