using System;

public class Test
{
	public static void Main()
	{
		Console.WriteLine(Max(1, 1));
		Console.WriteLine(Max(1, 2));
		Console.WriteLine(Max(2, 1));
		Console.WriteLine(Max(1, null));
		Console.WriteLine(Max(null, 1));
		Console.WriteLine(Max(null, null));
	}
	
	public static int? Max (int? a, int? b)
	{
		return a > b ? a : b ?? a;
	}
}