It's worth pointing out too that another answer, one that answers the question completely, and was posted two minutes prior to the hint answer.
I have no qualms with giving hint answers; such answers can be the most helpful to the asker. I also see the value in answers drawn from discussion in comments, so that the question actually has an answer (though community wiki seems appropriate). And, I don't mind when two similar answers appear, only minutes between them, as expecting someone to delete their answer minutes after somebody else completes their answer fosters the "race" mentality that is harmful for a number of reasons.
But, somehow, the combination of all three makes me want to recommend deletion. It's such a simple, short answer too, so there's not a lot of effort being wasted, and a full answer was given prior.
So, the answer seems to add nothing new to question, but at the same time, I can't fault the person who wrote it for writing it. Is it reasonable to recommend deletion in such circumstances? What about voting down? When is it appropriate to recommend deletion, instead of just voting down?