[Hacker Rank] Interview Preparation Kit: Dictionaries and Hashmaps: Sherlock and Anagrams. Documentation: better categories.

Author: Gonzalo Diaz

docs/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/sherlock_and_anagrams.md

@@ -1,7 +1,7 @@
 # [Sherlock and Anagrams](https://www.hackerrank.com/challenges/sherlock-and-anagrams)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingMedium`
+- Category: `#ProblemSolvingMedium` `#DictionariesAndHashmaps` `#Strings`
 
 Two strings are [http://en.wikipedia.org/wiki/Anagram](anagrams) of each other
 if the letters of one string can be rearranged to form the other string.