A structure paper I come by every now and then. Useful for competitive programming. (#549)

data_structures/README.md

@@ -4,6 +4,7 @@
 * [Simple, Fast, and Practical Non-Blocking and Blocking Concurrent Queue Algorithms](http://www.research.ibm.com/people/m/michael/podc-1996.pdf)
 * [RRB-Trees: Efficient Immutable Vectors](http://infoscience.epfl.ch/record/169879/files/RMTrees.pdf)
 * [Cuckoo Hashing](http://www.it-c.dk/people/pagh/papers/cuckoo-jour.pdf)
+* [Fenwick Tree](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.14.8917&rep=rep1&type=pdf)
 * [Hopscotch Hashing](http://mcg.cs.tau.ac.il/papers/disc2008-hopscotch.pdf)
 
 ## Hosted Papers