using System;

​

namespace FibCounterClass12

{

    class Program

    {

        static void Main(string[] args)

        {

            int fib1 = 0;

            Console.WriteLine(fib1);

​

            int fib2 = 1;

            Console.WriteLine(fib2);

​

            int i = 0;

            while (i < 18)

            {

                int fib3 = fib1 + fib2;

                Console.WriteLine(fib3);

​

                fib1 = fib2;

                fib2 = fib3;

​

                i++;

            }

        }

    }

}

​