using System;
using System.Collections;

class C
{
	static void Main()
	{
		Foo<ulong>(x:1, y:1);
	}

	static void Foo<T>(long? x, T y)
	{
		Console.WriteLine(1);
	}

	static void Foo<T>(long? y, ulong x)
	{
		Console.WriteLine(2);
	}
}