Merge branch 'master' of https://github.com/nisabmohd/DS-Implementations

Author: nisabmohd

src/Trees/AVL.java

@@ -6,7 +6,7 @@
 public class AVL<T extends Comparable<T>> extends BinarySearchTree<T> {
 
     // heights of nodes are stored
-    Map<TreeNode<T>, Integer> map;
+    private Map<TreeNode<T>, Integer> map;
 
     private TreeNode<T> root;