Or you just do the math to compute this formula.

Hello benlynch,

Only got to know of your comment today! 28 days later...

Thanks!

My apologies. I hadn't realised there was that tag.

You can check the tags of a kata before trying it. The ones tagged "Puzzles" often require some guessing and trial and error. Not everyone likes these kinds of challenges, so it's ok if you want to avoid them.

Please don't give hints in the comments of puzzle challenges.

The 1-liner is cool af, but unreadable. 'A+' for cool, 'C' for practices.

Thank you for the feedback. Glad you enjoyed the solution and got something out of it.

I always have mixed reactions when looking at other solutions as they're usually the 'make-it-1-line' solutions which wouldn't ever be used in a corporate environment. However, I thoroughly enjoyed seeing your solution as it makes so much sense (Annoyed I didn't think like this) and is easy to read.

Found this really useful to understand what you were doing. Actually made me smack my own head! Such a brilliant and logical approach. Thanks for the explanation!!!