namespace 
{
    using ;
    using System;
    using System.Collections;

    internal class 
    {
        private .[,] 
;
        private double[,] ;
        private bool[,] ;
        private int ;
        private int ;
        private . ;
        private . ;
        private Ÿ  = new Ÿ();
        private Ÿ  = new Ÿ();
        private ArrayList  = new ArrayList();

        public  (int X, int Y, int goalX, int goalY)
        {
            if ((X == goalX) && (Y == goalY))
            {
                return new (-1, 0);
            }
            int num = (this. * this.) ^ 2;
            int num2 = 0;
            ArrayList list = new ArrayList();
            this. = new .(goalX, goalY, 0.0, null, null, null);
            this. = new .(X, Y, 0.0, null, this., null);
            this.. = this.;
            this.. = this.;
            this..Add(this.);
            while (this..Count > 0)
            {
                if (num2 >= num)
                {
                    return new (-1, 0);
                }
                num2++;
                .  = (.) this..‰();
                if ((.
 == this..
) && (. == this..))
                {
                    while ( != null)
                    {
                        list.Insert(0, );
                         = .;
                    }
                    break;
                }
                foreach (. 2 in .(this))
                {
                    . 3 = null;
                    if (this..Contains(2))
                    {
                        3 = (.) this.[this..IndexOf(2)];
                        if (2.() > 3.())
                        {
                            continue;
                        }
                    }
                    . 4 = null;
                    if (this..Contains(2))
                    {
                        4 = (.) this.[this..IndexOf(2)];
                        if (2.() > 4.())
                        {
                            continue;
                        }
                    }
                    this..Remove(2);
                    this..Remove(2);
                    this..Š(2);
                }
                this..Add();
            }
            if (list.Count == 0)
            {
                return new (-1, 0);
            }
            . 5 = (.) list[1];
            return new (5.
, 5.);
        }

        public  •(int X, int Y, int goalX, int goalY)
        {
            if ((X == goalX) && (Y == goalY))
            {
                return null;
            }
            int num = (this. * this.) ^ 2;
            int num2 = 0;
              = new ();
            this. = new .(goalX, goalY, 0.0, null, null, null);
            this. = new .(X, Y, 0.0, null, this., null);
            this.. = this.;
            this.. = this.;
            this..Add(this.);
            while (this..Count > 0)
            {
                if (num2 >= num)
                {
                    return null;
                }
                num2++;
                . o = (.) this..‰();
                if ((o.
 == this..
) && (o. == this..))
                {
                    while (o != null)
                    {
                        .
.Push(new (o.
, o.));
                        o = o.;
                    }
                    break;
                }
                foreach (. 2 in o.(this))
                {
                    . 3 = null;
                    if (this..Contains(2))
                    {
                        3 = (.) this.[this..IndexOf(2)];
                        if (2.() > 3.())
                        {
                            continue;
                        }
                    }
                    . 4 = null;
                    if (this..Contains(2))
                    {
                        4 = (.) this.[this..IndexOf(2)];
                        if (2.() > 4.())
                        {
                            continue;
                        }
                    }
                    this..Remove(2);
                    this..Remove(2);
                    this..Š(2);
                }
                this..Add(o);
            }
            if (.
.Count == 0)
            {
                return null;
            }
            return ;
        }

        public bool –(int X, int Y, int goalX, int goalY)
        {
            try
            {
                if (this.[goalX, goalY] || ((this.
[goalX, goalY] != ..
) && (this.
[goalX, goalY] != ..)))
                {
                    return false;
                }
                return true;
            }
            catch
            {
                return false;
            }
        }

        public (.[,] squareStates, double[,] squareHeights, bool[,] squareUnitFlags)
        {
            this.
 = squareStates;
            this. = squareHeights;
            this. = squareUnitFlags;
            this. = squareUnitFlags.GetLength(1) - 1;
            this. = squareUnitFlags.GetLength(0) - 1;
        }
    }
}