LCA - Lower Common Ancestor

• http://www.java2blog.com/2016/04/lowest-common-ancestor-of-binary-tree.html

DFS and BFS

• http://www.java2blog.com/2015/12/depth-first-search-in-java.html

• http://www.java2blog.com/2015/12/breadth-first-search-in-java.html

Binary Search Tree

• Binary Search Tree
• http://www.tutorialspoint.com/data_structures_algorithms/binary_search_algorithm.htm

Serialize and De-Serialize Binary Search Tree

• Serialize and De-Serialize Binary Search Tree
• https://www.careercup.com/question?id=9253182
• http://www.geeksforgeeks.org/618/