Well the 99-problems were originally in Prolog, and many have to do with list manipulation, something that Haskell has built in. Additionally, Haskell will benefit from its lazy, functional nature, which makes dynamic programming, searching, and even some data structures a little cleaner.

I haven't worked with Java in quite a while, but I imagine that it still requires a lot of boilerplate and set up for trivial things in other languages. I'm sure if C were also included it would be the most verbose.