/*

Description

A number is input in computer then a new no should get printed by adding one to each of its digit. 

If you encounter a 9, insert a 10 (don't carry over, just shift things around).

​

For example, 998 becomes 10109.

​

Bonus

This challenge is trivial to do if you map it to a string to iterate over the input, operate, and 

then cast it back. Instead, try doing it without casting it as a string at any point, keep it 

numeric (int, float if you need it) only.

*/

​

using System;

public class Program

{

    public static void Main()

    {

        Random r = new Random();

        int start = 998;

        start = r.Next(100, 5000000);

        int working = start;

        int end = 0;

        int totalDigits = (int)Math.Floor(Math.Log10(start))+1;

        for (int i = 0; i <  totalDigits; i++)

        {

            int digit = working % 10;

            int divisor = (int)Math.Pow(10,Math.Max(i, (int)Math.Floor(Math.Log10(end))+1));

            end += ++digit * divisor;

            working /=10;

        }

        Console.WriteLine(string.Format("Original Number = {0} and New Number = {1}", start, end));

    }

}