using System;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        int value = 2021;

        int baseOrder = 3;

        StringBuilder str = new StringBuilder(1024);

        int absValue = Math.Abs(value);

        do

        {

            int mod = absValue % baseOrder;

            absValue /= baseOrder;

            str.Insert(0, mod);

        } while (--absValue >= 0);

​

        str.Replace("0", "Good");

        str.Replace("1", "Great");

        str.Replace("2", "Amazing");

        if (value < 0) str.Insert(0, "-");

        Console.WriteLine(str.ToString());

    }

}