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

    internal class  : IComparable
    {
        internal int 
;
        internal int ;
        internal . ;
        internal . ;
        private . ;
        internal double ;
        private double ;

        private . (int X, int Y)
        {
            int num = this.
 - this..
;
            int num2 = this.
 - this..;
            int num3 = this..
 - this..
;
            int num4 = this.. - this..;
            double num5 = Math.Abs((int) ((num * num4) - (num3 * num2))) * 0.005;
            return new .(X, Y, this. + num5, this, this., this.);
        }

        internal Collection<.> ( Pathfinder)
        {
            Collection<.> collection = new Collection<.>();
            if (Pathfinder.–(this.
, this., this.
 - 1, this.))
            {
                collection.Add(this.(this.
 - 1, this.));
            }
            if (Pathfinder.–(this.
, this., this.
 + 1, this.))
            {
                collection.Add(this.(this.
 + 1, this.));
            }
            if (Pathfinder.–(this.
, this., this.
, this. + 1))
            {
                collection.Add(this.(this.
, this. + 1));
            }
            if (Pathfinder.–(this.
, this., this.
, this. - 1))
            {
                collection.Add(this.(this.
, this. - 1));
            }
            if (Pathfinder.–(this.
, this., this.
 - 1, this. + 1))
            {
                collection.Add(this.(this.
 - 1, this. + 1));
            }
            if (Pathfinder.–(this.
, this., this.
 - 1, this. - 1))
            {
                collection.Add(this.(this.
 - 1, this. - 1));
            }
            if (Pathfinder.–(this.
, this., this.
, this. + 1))
            {
                collection.Add(this.(this.
, this. + 1));
            }
            if (Pathfinder.–(this.
, this., this.
, this. - 1))
            {
                collection.Add(this.(this.
, this. - 1));
            }
            if (Pathfinder.–(this.
, this., this.
 + 1, this. + 1))
            {
                collection.Add(this.(this.
 + 1, this. + 1));
            }
            if (Pathfinder.–(this.
, this., this.
 + 1, this. - 1))
            {
                collection.Add(this.(this.
 + 1, this. - 1));
            }
            return collection;
        }

        public (int X, int Y, double Cost, . Parent, . Goal, . Start)
        {
            this. = Parent;
            this. = Start;
            this. = Goal;
            this.
 = X;
            this. = Y;
            this. = Cost;
        }

        int IComparable.CompareTo(object obj)
        {
            return -this.().CompareTo(((.) obj).());
        }

        internal double goalEstimate
        {
            get
            {
                if (this. == null)
                {
                    return 0.0;
                }
                int num = 2 * this.
;
                int num2 = ((2 * this.) + (this.
 % 2)) - this.
;
                int num3 = ((-2 * this.) - (this.
 % 2)) - this.
;
                int num4 = 2 * this..
;
                int num5 = ((2 * this..) + (this..
 % 2)) - this..
;
                int num6 = ((-2 * this..) - (this..
 % 2)) - this..
;
                return Math.Max(Math.Abs((int) (num - num4)), Math.Max(Math.Abs((int) (num2 - num5)), Math.Abs((int) (num3 - num6))));
            }
            set
            {
                this. = value;
            }
        }

        internal double totalCost
        {
            get
            {
                return (this. + this.());
            }
        }
    }
}