using System;

class X
{
	static void Test (long value)
	{
		IntPtr ptr;
		try {
			ptr = new IntPtr (value);
			Console.WriteLine ("OK");
		} catch {
			Console.WriteLine ("ERROR");
		}
	}

	static void Main ()
	{
		Test (-1);
		Test (0x07fffffffL);
		Test (0x080000001L);
		Test (0x0bfffffffL);
		Test (0x0ffffffffL);
	}
}