FB面经 Prepare: LCA of Deepest Nodes in Binary Tree
Recursion: 返回的时候返回lca和depth，每个node如果有大于一个子节点的depth相同就返回这个node，如果有一个子节点depth更深就返回个子节点lca，这个o(n)就可以了 Iteration: tree的recursion换成iteration处理 ...
原文：1151 LCA in a Binary Tree（30 分）
The lowest common ancestor LCA of two nodes U and V in a tree is the deepest node that has both U and V as descendants. Given any two nodes in a binary tree, you are supposed to find their LCA. Input ...
2018-09-10 14:41 0 857 推荐指数：
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