using System;

namespace Kalucki4_5
{

    class Program
    {
        static void Main(string[] args)
        {
            Console.ReadKey();
        }
    }

    public interface IFigura
    {
        int Obwod { get; }
        int Pole { get; }
    }

    public class Kwadrat : IFigura
    {

        private int dl_boku_kwadrat;
        public int obwod_kwadrat;
        public int pole_kwadrat;

        public int Obwod {
            get {
                obwod_kwadrat = 4 * dl_boku_kwadrat;
                 return 0;
            } }


        public int Pole {
            get {
                pole_kwadrat = dl_boku_kwadrat * dl_boku_kwadrat;
                return 0;
            }}


        public override string ToString()
        {
            return dl_boku_kwadrat.ToString();
        }


    }

}