Thursday Code Puzzler: Lowest Common Ancestor

Thursday is code puzzler day here at DZone. The idea is simple: solve the coding problem as efficiently as you can, in any language or framework that you find suitable.

Note: Even though there really is nothing stopping you from finding a solution to this on the internet, try to keep honest, and come up with your own answer.  It's all about the participation!

Do you have code puzzlers that you'd like to share with the DZone community?  If so, please submit here. 

Find the Lowest Common Ancestor in a Binary Search Tree

Given a binary search tree, find the lowest common ancestor of two nodes on the tree. Wikipedia defines  the lowest common ancestor as follows: 

The lowest common ancestor is defined between two nodes v and w as the lowest node in T that has both v and w as descendants (where we allow a node to be a descendant of itself).

Catch up on all our previous puzzlers here.