using System;

namespace Kalucki4_5
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Kwadrat kw = new Kwadrat(5);
            Console.WriteLine(kw.ToString());
        }
    }

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

    public class Kwadrat : IFigura
    {
        private int dlBoku;

        public Kwadrat(int dlBoku)
        {
            this.dlBoku = dlBoku;
        }

        public int Obwod
        {
            get
			{
				return 4 * dlBoku;
			}
        }

        public int Pole
        {
            get
			{
				return dlBoku * dlBoku;
			}
        }

        public override string ToString()
        {
            return "Kwadrat: " + dlBoku.ToString();
        }
    }
}