UKH

What you up to at this hour? 

I'm on UKC.

A bit late, up your game! It was an experiment. Last time I did this in the wee small hours, maybe 6 or 7 years ago it generated some interesting chat. 

Ah, sorry. I'd been asleep at 5 to be fair. Bright sun woke me up at 6. Not that I'm complaining!

Been up since 3:30 this morning - around usual time.  Quarter past 5 would represent a long lie in.  Can't say it makes my UKC contributions especially interesting, but that's probably because I'm as boring as f*ck.

See you tomorrow morning - didn't look at UKC early today - too busy wrestling with red-black trees.

I'm intrigued, tell me more. 

It's a type of balanced binary search tree.  Yields search times (and other dictionary operations) O(lg n).  See - told you I was boring as f*ck

Got a lie in until 5:00 today!  Just getting light so out with the dogs before it gets too hot.