using System;

​

public class Program

{

    public static void Main(string[] args)

    {

        Console.WriteLine(IsActNumberBetween(6, 1933, 500, 1933, 5, 1993).ToString());

        Console.WriteLine(CompareActNumbers(6, 1933, 5, 1933, "IsBefore").ToString());

        Console.WriteLine(CompareActNumbers(6, 1933, 5, 1933, "IsAfter").ToString());

        Console.ReadLine();

    }

​

    public static bool IsActNumberBetween(ulong actNumber, int actYear, ulong firstNumber, int firstYear, ulong secondNumber, int secondYear)

    {

        //ulong actyear = Convert.ToUInt64(regNumber.Split('/')[1]);

        //ulong actnumber = Convert.ToUInt64(regNumber.Split('/')[0]);

        //ulong minactyear = Convert.ToUInt64(minRegNumber.Split('/')[1]);

        //ulong minactnumber = Convert.ToUInt64(minRegNumber.Split('/')[0]);

        //ulong maxactyear = Convert.ToUInt64(maxRegNumber.Split('/')[1]);

        //ulong maxactnumber = Convert.ToUInt64(maxRegNumber.Split('/')[0]);

        try

        {

            if (actYear >= Math.Min(firstYear, secondYear) || actYear <= Math.Max(firstYear, secondYear))

            {

                var bigger = Math.Max(actNumber.ToString().Length, Math.Max(firstNumber.ToString().Length, secondNumber.ToString().Length));

                actNumber = Convert.ToUInt64(actNumber.ToString().PadRight(bigger, '0'));

                firstNumber = Convert.ToUInt64(firstNumber.ToString().PadRight(bigger, '0'));

                secondNumber = Convert.ToUInt64(secondNumber.ToString().PadRight(bigger, '0'));

                return BetweenRanges(Convert.ToUInt64(firstYear.ToString() + firstNumber.ToString()), Convert.ToUInt64(secondYear.ToString() + secondNumber.ToString()), Convert.ToUInt64(actYear.ToString() + actNumber.ToString()));

            }

        }

        catch (Exception ex)

        {

            return false;

        }

​

        return false;

    }

​

    public static bool CompareActNumbers(ulong actNumber, int actYear, ulong firstNumber, int firstYear, string compare)

    {

        try

        {

            switch (compare)

            {

                case "IsBefore":

                    if (actYear < firstYear)

                    {

                        var bigger = Math.Max(actNumber.ToString().Length, firstNumber.ToString().Length);

                        actNumber = Convert.ToUInt64(actNumber.ToString().PadRight(bigger, '0'));

                        firstNumber = Convert.ToUInt64(firstNumber.ToString().PadRight(bigger, '0'));

                        return BeforeDate(Convert.ToUInt64(firstYear.ToString() + firstNumber.ToString()), Convert.ToUInt64(actYear.ToString() + actNumber.ToString()));

                    }

                    else if (actYear == firstYear)

                    {

                        return BeforeDate(Convert.ToUInt64(firstYear.ToString() + firstNumber.ToString()), Convert.ToUInt64(actYear.ToString() + actNumber.ToString()));

                    }

​

                    break;

                case "IsAfter":

                    if (actYear >= firstYear)

                    {

                        var bigger = Math.Max(actNumber.ToString().Length, firstNumber.ToString().Length);

                        actNumber = Convert.ToUInt64(actNumber.ToString().PadRight(bigger, '0'));

                        firstNumber = Convert.ToUInt64(firstNumber.ToString().PadRight(bigger, '0'));

                        return AfterDate(Convert.ToUInt64(firstYear.ToString() + firstNumber.ToString()), Convert.ToUInt64(actYear.ToString() + actNumber.ToString()));

                    }

                    else if (actYear == firstYear)

                    {

                        return BeforeDate(Convert.ToUInt64(firstYear.ToString() + firstNumber.ToString()), Convert.ToUInt64(actYear.ToString() + actNumber.ToString()));

                    }

​

                    break;

            }

        }

        catch (Exception ex)

        {

            return false;

        }

​

        return false;

    }

​

    public static bool BetweenRanges(ulong a, ulong b, ulong number)

    {

        return (a <= number && number <= b);

    }

​

    public static bool BeforeDate(ulong a, ulong number)

    {

        return (number <= a);

    }

​

    public static bool AfterDate(ulong a, ulong number)

    {

        return (a <= number);

    }

}