title: What are some lesser known data structures and algorithms that one should know of?
body: <p>Recently I came across the SkipList data structure. It really helped me to solve an otherwise difficult-to-solve problem. I was struggling to solve it using Balanced Binary tree but it became very complex as the tree needs to be always balanced and I wanted to know the existence of not only a particular value but values in a certain range. SkipList helped me to solve that problem effectively.</p>
  
  <p>I am wondering what other data structures do I need to know of? I know about - Array, List, Stack, Queue, Linked List, hashtable, tree and its different forms like B-tree, Trie etc. 
  Would like to know if you find some other data structure/concept interesting as well as useful in a regular development cycle.</p>