No doubt. I wasn't really complaining, but that was the one that seemed to cause the most headaches last year. And the text had the problem fully specified, there really was no good way to make it better other than perhaps a different presentation (also a hard problem) or a few extra test cases to tease out those potential misreadings. But you can't catch every error for the participants, coming up with tests is part of the challenge.

It's not really the instructions, but having to implement an obviously imperative ruleset using Elixir. I completed the previous two years using Javascript and Ruby, and it's honestly much easier when you have access to imperative constructs. This year I'm using F#, we'll see how it goes.