using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        // get user input here instead of having x

        Console.Write("Enter a positive integer: ");

        int input = Convert.ToInt32(Console.ReadLine());

        int i = input-1;

        while(i > 1) 

        {           

            List<int> numList = new List<int>();

            bool print = false;

            int tempInput = input;

            while(true)

            {   

                int remainder = tempInput % i; 

                if(tempInput/i == remainder){

                    numList.Add(remainder);

                    numList.Add(remainder);

                    print = true;

                    break; 

                }

                if((tempInput/i)%i == remainder){

                    numList.Add(remainder); 

                    tempInput = tempInput/i;

                }

                else {

                    break;

                }

                //      i = i + 1;

            }

            if (print) {

                Console.Write("{0} in base 10 is ", input);

                for (int j = 0; j < numList.Count-1; j++) {

                    Console.Write(numList[j] + ",");

                }

                Console.Write(numList[numList.Count-1] + " in base " + i);

                Console.WriteLine();                

            }

            i--; 

        }

    }

}

​