AnyNumericSystem

using System;



class AnyNumeralSystem
{
    static void Main()
    {
        Console.WriteLine("Enter base S to use:");
        int baseNumeralSystemS = int.Parse(Console.ReadLine());
        Console.WriteLine("\nEnter base D to convert:");
        int baseNumeralSystemD = int.Parse(Console.ReadLine());
        Console.WriteLine("\nEnter number:");
        string number = Console.ReadLine();
        int digit = 0;
        int sum = 0;
        int startIndex = number.Length - 1;

        for (int i = 0; i < number.Length; i++)
        {
            string part = number.Substring(startIndex, 1);
            digit = Convert.ToInt32(part) * (int)Math.Pow(baseNumeralSystemS, i);
            sum = sum + digit;
            startIndex--;
        }
        Console.WriteLine("\nShowing the result:");

        int count = 0;
        for (int i = 31; i >= 0; i--)
        {
            int exponent = (int)Math.Pow(baseNumeralSystemD, i);
            digit = sum / exponent;
            sum = sum % exponent;
            if (digit != 0)
            {
                count++;
            }
            if (count > 0)
            {
                Console.Write(digit);
            }
        }
        Console.WriteLine("\n");


    }
}