Is it possible to import libraries into the Haskell framework. I need some low dimension linear algebra for Mars landing!
Can’t you recode matrix operations?
You cannot import any and every libraries. You can only use libraries specified here: https://www.codingame.com/faq 
See: https://www.codingame.com/forum/t/haskell-included-packages/185259
One of the Haskell Platform provided libraries might do what you want.