I don't understand the maths (as in why the angles add up the way they do), so I googled it, which just gave me the answer. I understand the calculation in terms of the output of the code, but I clearly do not understand how polygon angles work. I'm not sure that this would come up outside of an exercise trying to teach the maths though.

This is a classic math problem, and it requires no additional explanation.

No response for nearly a year. Issue closed. Please raise a new one if you still find any issue.

Which error? With 500+ solvers in Python, I highly doubt there is an error in test suite.

Warning: js float is not that accurate.

Allies are people who both you follow, and who have followed you back (or vice versa). You don't necessarily just add allies with a click of a button, but its not too hard to obtain a few. Good question though :)

I get what you're saying, but actually most of the rules do not have any priority. The only ones that are important are OMG, LOL, and word count, which should all be performed in that order. They are intentionally listed in this order in the description, so if you just work your way from the top down you'll be fine.