private BFSNode(PatternDatabase db, MiniBoard board, int empty_row, int empty_col, int distance, Direction direction)
{
this.db = db;
this.empty_row = empty_row;
this.empty_col = empty_col;
this.board = board;
this.distance = distance;
this.direction = direction;
}
public BFSNode(PatternDatabase db) // initial state --> the empty tile is in the bottom right corner
{
this.db = db;
this.empty_row = db.rows - 1;
this.empty_col = db.cols - 1;
this.direction = Direction.NONE;
this.board = new MiniBoard(db.rows, db.cols);
this.distance = 0;
}
static void Main()
{
// Read board dimensions
Console.Write("Choose dimensions of the puzzle (type `3` for 3x3 or `4` for 4x4): ");
int w = int.Parse(Console.ReadLine()), h = w;
PuzzleType type;
if (w == 3)
{
type = PuzzleType.PUZZLE_3x3;
}
else if (w == 4)
{
type = PuzzleType.PUZZLE_4x4;
}
else
{
Console.WriteLine("\nPuzzle {0:d}x{1:d} is not supported! Only 3x3 and 4x4 are supported.", w, h); return;
}
//
// Read a board configuration from the standard input
Console.WriteLine("\nEnter a configuration of the puzzle in the following format:");
Console.WriteLine(" --> 1 2 3 4 5 6 7 8 9");
int[,] board = new int[w, h];
int i = 0;
foreach (string str in Regex.Split(Console.ReadLine(), "[ ]+"))
{
if (str.Trim() == string.Empty)
{
continue;
}
board[(i / w), (i % w)] = int.Parse(str);
if ((++i) >= (w * h))
{
break;
}
}
// Initialize the Statically-Partitioned Additive Pattern Database Heuristic
Console.Write("\nInitializing the Pattern Database...");
patternDB = new PatternDatabase(type);
Console.WriteLine("done.");
// Compute the solution
Console.Write("\nSolving the puzzle...");
Solution solution = IDAStar(new Board(board));
Console.WriteLine("done.\n");
solution.PrintPath();
Console.WriteLine("\nPress any key to exit...");
Console.ReadKey();
}