Leetcode日练笔记39 [二叉树recursion专题] #104 #101 Maximum Depth of Binary Tree & Symmetric Tree {Python}
#104MaximumDepthofBinaryTreeGiventherootofabinarytree,returnitsmaximumdepth.Abinarytree'smaximumdepthisthenumberofnodesalongthelongestpathfromtherootnodedowntothefarthestleafnode.Example1