Update README.md

raunit-x · web-flow · commit 30dffb65b067 · 2019-04-07T12:11:09.000+05:30
diff --git a/README.md b/README.md
@@ -16,5 +16,6 @@
 iii) List of Lists
  iv) Maps(Dictionary)
 12) K Stacks in a single array (space efficient method)
-13) AVL Trees (Self Balancing BSTs)
+13) AVL Trees (Self Balancing BSTs), RB Trees, Treaps
 14) Implementation of doubly linked lists (Circular)
+15) Skip Lists (randomized data structures)
