using System;

public class Program

{

    public static void Main()

    {

        string input;

        Converter convert = new Converter();

        Console.Write("Input Roman Numeral:");

        input = Console.ReadLine();

        while(input.Length != 0)

        {

            int first = ToArabic(input[0]);

            int second;

            if(input.Length > 1) second = ToArabic(input[1]); 

            else second = 0;

            if(first >= second)

            {

                convert.Add(first);

                input = input.Remove(0,1);

            }

            else 

            {

                convert.Add(first, second);

                input = input.Remove(0,2); 

            }

        }

        Console.WriteLine("In arabic: " + convert.Total);

    }

    public static int ToArabic(char roman)

    {

        if(roman == 'i' || roman == 'I')

        {

            return 1;

        }

        else if(roman == 'x' || roman == 'X')

        {

            return 10;

        }

        else if(roman == 'c' || roman == 'C')

        {

            return 100;

        }

        else if(roman == 'm' || roman == 'M')

        {

            return 1000;

        }

        else if(roman == 'v' || roman == 'V')

        {

            return 5;

        }

        else if(roman == 'l' || roman == 'L')

        {

            return 50;

        }

        else if(roman == 'd' || roman == 'D')

        {

            return 500;

        }       

        return 0;

    }

}

​

class Converter

{

    private int total;

    public int Total

    {

        get { return total; }

        set { total = value; }

    }

    public void Add(int input)

    {

        total += input; 

    }

    public void Add(int subtrahend, int minuend)

    {

        total += (minuend - subtrahend);

    }

}