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  • Updated to build without warnings in the wake of GHC 7.10.
  • Use (and re-export) the new overloaded null and length from Prelude on GHC 7.10+
  • Modified mkeep, mdrop and mlca to parameterize them by monoid homomorphisms. This permits cheaper summaries to be calculated over the dropped path, when only a portion of the information in the path is required.


  • Fixed a bug in path reconstruction


  • Improved documentation to also note that this package also provides an improvement in the online version of the level ancestor problem.


  • Added README
  • Better haddock coverage
  • Added links to documentation