Hi, Paul — that's very kind of you, thanks! I got into a rhythm with these things a couple of weeks ago, and just had at them like a lunatic. Just as cosmic inflation forever forbids us from ever keeping up with the universe's expansion, I'll never overtake your mad code challange accomplishments, but I'll keep at 'em. Congrats on your sparkly new job, and I hope you're having other-worldly amounts of fun there!

The tests aim to check the validity and completeness of a solution. They don't aim not to irritate you.

Uh, would you mind elaborating?

"A well posed problem..."

versus (see discourse immediately below) "The desciption is extremely vague..."

LOL. It is hard to please everybody. I'm glad you liked it :-)

I think it's part of the game. I've learnt a lot spending time on apparently (and/or actually) very easy problems; sometimes it takes me months to solve some of them, and I have tens of them still unsolved. Just because you don't earn points from it doesn't mean it's lost. Also, it's a reasonnable choice to move on to another problem in some cases when you can't figure it out. There are many katas.

Tests won't be changed after more than 23,000 completions,