using System;

public class Fib{
   Decimal current;
   Decimal last;
   public Fib(){
      current = 1;
      last = 0;
   }

   private Fib(Decimal last, Decimal secondToLast){
      current = last+secondToLast;
      this.last = last;
   }

   public Fib GetNext(){
      return new Fib(current, last);
   }

   public Decimal Value{
      get{return current;}
   }
}