[E]104. Maximum Depth of Binary TreeTing Chung·FollowMay 19, 2021--ListenSharehttps://leetcode.com/problems/maximum-depth-of-binary-tree/Stack: 存nodeDepth: 存last state看到的好方法https://leetcode.com/problems/maximum-depth-of-binary-tree/discuss/34190/A-simple-Python-recursive-solution-O(n)-60ms