[xw30992]

I get that. I only do medium and easy problems for a reason. Hard problems are hard and I want to solve it over morning coffee. :)

Then again, I'm sure all of my leisure activities are a waste of time on someone's metric.

I probably learn more from the comments than the problems though. People post lots of interesting idioms and it's interesting to me to see how others codify various standard algorithms. Especially across languages.