Just finished in java, seems to have fixed.

The problem description is confusing: it meant "a single digit".

Use spoiler flag when pasting code like that, rank should be 1, 2, 3, etc.

Try casting to float instead of double. Maybe it'll work.

seems it already has been handled

Feels like that gives away the puzzle part...

Sorry, matrix got messed up on posting, but you get the gist

I'll take suggestions on a concise description if you could provide it

The kata description could stand to be more, well, descriptive. While part of this kata is understanding the puzzle of what the pattern is, it can at least state that clearly.

I fully agree that this output is totally stupid, yes. Though, it requires only one single line of code to handle that case and the kata is functional by essence, moreover when that is especially explained in the description. And since that is the same in all languages and the kata having alreaydy thausends of solutions using this... I wouldn't considere this an issue (even if, yes, again, that is stupid).

So, resolved, sorry.

• langauge?
• input?

Re-ranked to 7 kyu

I think this one i a 7kyu because not many people will remember the geometric formula for sum of interior angles as it relates to number of sides. If those mistakes were intentonal, then it should say in the description, there is a problem with the given code, part of the challenge is to fix it.

seeing how this question is too easy for 7kyu, we might want to flag that comment. Sometimes real coding is about fixing bugs.