using System;

namespace Lab5

{

    abstract class Point

    {

        public abstract void Input();

        public abstract void Output();

    }

    class Point2D : Point

    {

        private int x;

        private int y;

        public override void Input()

        {

            Console.Write("x = ");

            x = int.Parse(Console.ReadLine());

            Console.Write("y = ");

            y = int.Parse(Console.ReadLine());

        }

        public override void Output()

        {

            Console.WriteLine("x = {0}, y = {1}", x, y);

        }

    }

    class Point3D : Point

    {

        private int x;

        private int y;

        private int z;

        public override void Input()

        {

            Console.Write("x = ");

            x = int.Parse(Console.ReadLine());

            Console.Write("y = ");

            y = int.Parse(Console.ReadLine());

            Console.Write("z = ");

            z = int.Parse(Console.ReadLine());

        }

        public override void Output()

        {

            Console.WriteLine("x = {0}, y = {1}, z = {2}", x, y, z);

        }

    }

    class RectangularArea

    {

        private static int top;

        private static int bottom;

        private static int left;

        private static int right;

        private static RectangularArea instance = null;

        private RectangularArea()

        {

            top = 0;

            bottom = 1000;

            left = 0;

            right = 1000;

        }

        public static RectangularArea GetInstance

        {

            get

            {

                if (instance == null)

                    instance = new RectangularArea();

                return instance;

            }

        }

        public int Left

        {

            get { return left; }

        }

        public int Right

        {

            get { return right; }

        }

        public int Top

        {

            get { return top; }

        }

        public int Bottom

        {

            get { return bottom; }

        }

        public void Info()

        {

            Console.WriteLine("Boundaries Top {0}, Bottom {1} Left {2} Right {3}", top, bottom, left, right);

        }

    }

    public class Program

    {

        public static void Main(string[] args)

        {

            RectangularArea area = RectangularArea.GetInstance;

            area.Info();

            Console.Write("Enter number of points: ");

            int n = int.Parse(Console.ReadLine());

            Point[] points = new Point[n];

            for (int i = 0; i < n; i++)

            {

                Console.Write("Enter point type (2D/3D): ");

                string type = Console.ReadLine();

                if (type == "2D")

                    points[i] = new Point2D();

                else

                    points[i] = new Point3D();

                points[i].Input();

            }

            for (int i = 0; i < n; i++)

            {

                points[i].Output();

            }

        }

    }

}