[CareerCup] 4.7 Lowest Common Ancestor of a Binary Search Tree 二叉树的最小共同父节点
4.7 Design an algorithm and write code to find the first common ancestor of two nodes in a binary tree. Avoid storing additional nodes in a data structure. NOTE: This is not necessarily a binary search tree.
LeetCode上的原题,请参见我之前的博客Lowest Common Ancestor of a Binary Tree 二叉树的最小共同父节点。
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