public static void Main(string[] args)
        {
            var app = new CommandLineApplication();

            app.Name = "console-runner";
            app.HelpOption("-?|-h|--help");

            app.OnExecute(() =>
            {
                Console.WriteLine("Invalid argument: empty");
                return(1);
            });

            CheckUncheckedCommand.Register(app);
            SolveCommand.Register(app);
            SolveUnsolvedCommand.Register(app);
            SolveBlockCommand.Register(app);
            SubmitCommand.Register(app);
            CsvCommand.Register(app);

            app.Execute(args);
        }