These are Renzo Carbonara's Haskell solutions to some programming challenges from HackerRank.
Using cabal-dev:
cabal-dev install --enable-test
./cabal-dev/bin/hr
That will print to standard output the list of challenge solutions
available. Pick one, say saveprincess, and run it as:
./cabal-dev/bin/hr saveprincess
My solutions are put in the Public Domain, as explained by the LICENSE
file found in this repository.