> BTW, I wonder how do you think to rate the time required to implement 
> something. I could take a week to write a quicksort in ML, but probably 
> an MLer could do that in one minute.

I don't really know right now, but any suggestion is very welcome. Maybe 
I just try to find nice programming tasks where design really matters 
and performance is pretty irrelevant, and just present the solutions 
without any rating.

martinus