[snprbob86]

> An issue with this puzzle is that the objective is not clearly stated upfront. The author should make it clear ...

It's an interview question. You're supposed to ask for clarification. In fact, demonstrating your ability to elicit requirements is an important part of a technical interview.

[jessriedel]

That doesn't make any sense for a webpage. You either state the problem cleanly, or you explicitly discuss the point of clarification interview questions. But just putting up an ambiguous question with no recourse for the reader (other than carefully reading the answer and inferring what the author meant to ask) is sloppy.