using System;

public class Program

{

    public static void Main()

    {

        decimal d;

        //21

        Console.WriteLine(decimal.TryParse("202105130000186670000.0", out d));

        Console.WriteLine(decimal.TryParse("2021051300001866700009.0", out d));

        Console.WriteLine(decimal.TryParse("20210513000018667000099.0", out d));

        Console.WriteLine(decimal.TryParse("202105130000186670000999999999.0", out d));

    }

}