public static void day13()
        {
            Dictionary<int, Dictionary<int,int>> map = new Dictionary<int, Dictionary<int, int>>();
            Func<int, int, int> get = (xp, yp) =>
            {
                if( !map.ContainsKey(yp)) return 0;
                if( !map[yp].ContainsKey(xp)) return 0;

                return map[yp][xp];
            };

            int blocks = 0;

            int currentoutput = 0;

            int lastballx = int.MinValue;
            int lastpaddlex = int.MinValue;
            int wait = 1;
            Action<int, int, int> set = (xp, yp, c) =>
            {
                if( !map.ContainsKey(yp) ) map.Add(yp,  new Dictionary<int, int>());
                map[yp][xp] = c;

                Console.SetCursorPosition(xp, yp);
                if( c == 0 ) Console.Write( " ");
                if( c == 1 ) Console.Write("#");
                if( c == 2 )
                {
                    Console.Write("=");
                    blocks++;
                }
                if( c == 3 )
                {lastpaddlex = xp;
                    Console.Write("-");
                }
                if( c == 4 )
                {
                    lastballx =xp;

                    Console.Write("o");
                }
            };

            runicomputertestharness();

            string data = "";
            System.IO.File.ReadAllLines(@"G:\Workspace\AdventOfCode2019\Input\day13.txt").ToList().ForEach((s) =>
            {
                data += s;
            });

            int ans = int.MinValue;

            var computer = new icomputer(data.Split(',').Select(datum => BigInteger.Parse(datum)).ToList());

            int n = 0;
            int x = 0;
            int y = 0;
            int score = 0;


            computer.putOutput = (o) =>
            {
                if( n == 0 ) x = (int)o;
                if( n == 1 ) y = (int)o;
                if( n == 2 )
                {
                    if( x == -1 && y == 0 )
                    {
                        score = (int)o;
                        if( score > 0 )
                        {
                            ;
                        }
                    }
                    else
                    {
                        set(x, y, (int)o);

                    }
                }

                n++;
                if( n >= 3 ) n = 0;
            };

            computer.getInput = () =>
            {
                if (Console.KeyAvailable)
                {
                    Console.WriteLine(score);
                    ;
                }
                if ( lastpaddlex < lastballx ) return 1;
                if (lastpaddlex > lastballx) return -1;
                return 0;
                return currentoutput;
            };

            while( true )
            computer.Run();

            int answer = 0;
            foreach( var r in map )
            {
                foreach( var c in r.Value )
                {
                    if( c.Value == 2 ) answer++;
                }
            }


            Console.WriteLine("==answer==");
            Console.WriteLine(answer);
            Console.ReadKey(true);
        }