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How to find the lowest common ancestor of the two given nodes in a Tree?

+7 votes
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A binary tree is given and two nodes of this tree is given, we have to find out the algorithm/code for lowest common ancestor of the two given nodes. Common ancestor are the nodes which can be reached from two nodes by following the parent links. Lowest common ancestor is the common ancestor which has the highest depth.

posted Jan 2, 2014 by anonymous

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Given root of a Binary Tree along with two integer values. Find the LCA of two nodes with values of the given integers..

Given the root of a Binary Tree along with two integer values. Assume that both integers are present in the tree.
Find the LCA (Least Common Ancestor) of the two nodes with values of the given integers.
2 pass solution is easy. You must solve this in a single pass.

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