[grogenaut]

As I said, it depends. If it's text heavy, python or ruby (or perl) is likely the best. If it uses a lesser known data structure, maybe java with it's massive set of libraries. If it's bit twiddling or memory intensive, then maybe c++ is the right answer. But a lot of questions are trivial in ruby or python. 3sum can be done in 2 lines of ruby (how I wish it was one, would be cooler).