I was recently made responsible for hiring a few students for the summer internships at my company. I've designed a simple homework for them to solve to get rid of some of the applications as early as possible. The task was very simple and didn't require too much effort to do.
One of the candidates tried very hard and overdid it, and I didn't find his submission good enough to warrant a meeting. Adhering to the policy I've set for myself, I emailed him with all the feedback and encouraged to try again next year. I specifically pointed out that his solution was overblown.
After that, though, he responded with another version of his solution that, while simpler, still doesn't look good enough to me. To be honest, I hate to be in this position, and it strikes me as rather pushy. I really don't want to answer with more feedback again, to be met with yet another, "final" version.
How should I deal with this situation? Should I respond at all? I've read that stating all the reasoning again opens up more debate, but then again a very short reply like "we're really not interested at this moment" reads almost rude to me.