In this assignment, you will model the game of Bulgarian Solitaire. The game starts with 45 cards. (They need not be playing cards. Unmarked index cards work just as well.) Randomly divide them into some number of piles of random size. For example, you might start with piles of size 20, 5, 1, 9, and 10. In each round, you take one card from each pile, forming a new pile with these cards. For example, the sample starting configuration would be transformed into piles of size 19, 4, 8, 10, and 5. The solitaire is over when the piles have size 1, 2, 3, 4, 5, 6, 7, 8, and 9, in some order. (It can be shown that you always end up with such a configuration.)

In your program, produce a random starting configuration and print it. Then keep applying the solitaire step and print the result. Stop when the solitaire final configuration is reached.

Complete the following files:

BulgarianSolitaire.java

import java.util.ArrayList; import java.util.Random; public class BulgarianSolitaire { private ArrayList<Integer> piles; /** Sets up the game randomly with some number of piles of random size. The pile sizes add up to 45. */ public void setupRandomly() { . . . } /** This method can be used to set up a pile with a known (non-random) configuration for testing. @param pileSizes an array of numbers whose sum is 45 */ public void setup(int[] pileSizes) { piles = new ArrayList<Integer>(); for (int s : pileSizes) piles.add(s); } public String getPiles() { return piles.toString(); } /** Play the game. */ public void play() { while (!isDone()) { System.out.println(getPiles()); playRound(); } System.out.println(getPiles()); } /** Play one round of the game. */ public void playRound() { . . . } /** Checks whether the game is done. @return true when the piles have size 1, 2, 3, 4, 5, 6, 7, 8, and 9, in some order. */ public boolean isDone() { . . . } }

BulgarianSolitaireTester.java

/** Tests the game of Bulgarian Solitaire. */ public class BulgarianSolitaireTester { public static void main(String[] args) { BulgarianSolitaire deck = new BulgarianSolitaire(); int[] initialSizes = { 20, 5, 1, 9, 10 }; deck.setup(initialSizes); System.out.println(deck.isDone()); System.out.println("Expected: false"); deck.playRound(); System.out.println(deck.getPiles()); System.out.println("Expected: [19, 4, 8, 9, 5]"); } }

Use the following file:

BulgarianSolitairePlayer.java

/**
      Play the game of Bulgarian Solitare.
*/
public class BulgarianSolitairePlayer
{
   public static void main(String[] args)
   {
      BulgarianSolitaire deck = new BulgarianSolitaire();
      deck.setupRandomly();
      deck.play();
   }
}