using System;

public class Program

{

    public static void Main()

    {

        int a;

        string b;

        a = 3;

        Console.WriteLine("Deret ukur");

        Console.WriteLine(a);

        while(a>=1)

        {

        Console.WriteLine("Hitung lagi?"+"[Y/N]");

        b = Console.ReadLine();

            if(b == "Y" || b == "y")

            {a = a * 3;

            Console.WriteLine(a);}

            if(b == "N" || b == "n")

            {break;}

        }

    }

}