using System;

public class Program

{

    public static void Main()

    {

        try

        {

            Console.WriteLine("Hello World");

        string xxxx = "1684654587984459999";

            Console.WriteLine("Hello World" + Convert.ToInt64(xxxx));

        Console.WriteLine("Hello World" + Convert.ToDouble(xxxx));  

        }

        catch(Exception ex)

        {

            Console.WriteLine("Hello World" + ex);  

        }

    }

}