I've seen a lot of complaints that some of the languages are very slow, but the time goes on and these languages upgrade and become faster (from what i know, clojure, scala and haskell are now much faster compared to the versions used on spoj). How hard would it be to upgrade them?
I also wanted to ask about scala compiler - do you use scalac or fsc (fast scala compiler), because the second one should be faster?
wbr