Somehow it is not clear to me who the answers should actually serve, when the interviewer has already received the correct answers and after 2-3 months probably solves another problem a long time ago (or nothing). I would understand this where the original answers were not sufficient or were not correct, but the answer, which only repeats what has already been written in other words, suspiciously resembles infamous practices from other similar servers. However, if it is the admin's interest, we should all do it, most importantly, it should remain cool :)