namespace 
{
    using System;
    using System.Collections;

    internal class  : IComparable
    {
        private  
;
        private double ;
        private double ;
        private  ;

        public virtual bool ( ANode)
        {
            return false;
        }

        public virtual void ()
        {
            this. = 0.0;
        }

        public virtual void (ArrayList ASuccessors)
        {
        }

        public bool †()
        {
            return this.(this.);
        }

        public virtual void ‡()
        {
        }

        public ( AParent,  AGoalNode, double ACost)
        {
            this.
 = AParent;
            this. = ACost;
            this.ƒ(AGoalNode);
        }

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

        public override bool Equals(object obj)
        {
            return this.(() obj);
        }

        public override int GetHashCode()
        {
            return base.GetHashCode();
        }

        public double Cost
        {
            get
            {
                return this.;
            }
            set
            {
                this. = value;
            }
        }

        public double GoalEstimate
        {
            get
            {
                this.();
                return this.;
            }
            set
            {
                this. = value;
            }
        }

        public  GoalNode
        {
            get
            {
                return this.;
            }
            set
            {
                this. = value;
                this.();
            }
        }

        public  Parent
        {
            get
            {
                return this.
;
            }
            set
            {
                this.
 = value;
            }
        }

        public double TotalCost
        {
            get
            {
                return (this.() + this.());
            }
        }
    }
}