func main()
	var n: int :: cui@inputInt()
	var a: []int :: #[n]int
	for i(0, n - 1)
		do a[i] :: cui@inputInt()
	end for
	
	var ans: bool :: true
	for i(1, n - 1)
		if(a[i] = 1)
			do ans :: !ans
		else
			do ans :: true
		end if
	end for
	do cui@print((ans ?("Alice", "Bob")) ~ "\n")
end func