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  1. package hackerrankQuestion.fidelity;
  2.  
  3. import java.util.Scanner;
  4.  
  5. public class Solution
  6. {
  7.  
  8.     // The following code is already present.
  9.     public static void main(String[] args)
  10.     {
  11.         Scanner sc = new Scanner(System.in);
  12.         int x1 = sc.nextInt();
  13.         int y1 = sc.nextInt();
  14.         int z1 = sc.nextInt();
  15.         int x2 = sc.nextInt();
  16.         int y2 = sc.nextInt();
  17.         int z2 = sc.nextInt();
  18.  
  19.         Point2D p1 = new Point2D(x1, y1);
  20.         Point2D p2 = new Point2D(x2, y2);
  21.  
  22.         Point3D p3D1 = new Point3D(x1, y1, z1);
  23.         Point3D p3D2 = new Point3D(x2, y2, z2);
  24.  
  25.         double twoDdistance = p1.distanceFrom(p2);
  26.         double threeDdistance = p3D1.distanceFrom(p3D2);
  27.         p1.printDistance(twoDdistance);
  28.         p3D1.printDistance(threeDdistance);
  29.  
  30.     }
  31.  
  32. }
  33.  
  34. //we need to implement the following classes
  35. class Point2D
  36. {
  37.     int x, y;
  38.  
  39.     public Point2D(int x, int y)
  40.     {
  41.         this.x = x;
  42.         this.y = y;
  43.     }
  44.  
  45.     public double distanceFrom(Point2D p)
  46.     {
  47.         int subx = p.x - this.x;
  48.         int suby = p.y - this.y;
  49.  
  50.         return Math.sqrt(((subx * subx) + (suby * suby)));
  51.     }
  52.  
  53.     public void printDistance(double d)
  54.     {
  55.         System.out.println("2D distance=" + (int) Math.ceil(d));
  56.     }
  57. }
  58.  
  59. class Point3D extends Point2D
  60. {
  61.     int z;
  62.  
  63.     public Point3D(int x, int y, int z)
  64.     {
  65.         super(x, y);
  66.         this.z = z;
  67.     }
  68.  
  69.     public double distanceFrom(Point3D p)
  70.     {
  71.         int subx = p.x - this.x;
  72.         int suby = p.y - this.y;
  73.         int subz = p.z - this.z;
  74.  
  75.         return Math.sqrt(((subx * subx) + (suby * suby) + (subz * subz)));
  76.     }
  77.  
  78.     public void printDistance(double d)
  79.     {
  80.         System.out.println("3D distance=" + (int) Math.ceil(d));
  81.     }
  82. }
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