using System;

namespace Prov
{
    public class A
    {
        public int a=2, b=3;
        public int c
        {
            get
            {
                do
                {
                    a = a + a;
                    --b;
                }
                while
                    (a < 30);
                return
                    (a - b);
            }
            set
            {
                c = value;
            }
        }
    }
    class programm
    {
        public static void Main()
        {
            A myB = new A();
            Console.WriteLine(myB.c);
            Console.ReadLine();
        }
    }
    public class B : A
    {
        public B() : base() { }
    }
}