using System;

class Program
{
    static void Main()
    {
        Console.WriteLine("{0}", IntPtr.Size);

        const long x = 0xFFFFFFFFFFFFFFFL;
        checked
        {
            try
            {
                Console.WriteLine("{0}", (nint)x);
            }
            catch (Exception e)
            {
                Console.WriteLine("{0}", e.GetType());
            }
        }

        unchecked
        {
            Console.WriteLine("{0}", (nint)x);
        }
    }
}