摘要：
原题链接：https://leetcode-cn.com/problems/balanced-binary-tree/，https://leetcode-cn.com/problems/ping-heng-er-cha-shu-lcof/ 解题思路：递归。左右子树的高度差不大于1，且左右子树都是平衡 阅读全文
摘要：
1 # Definition for a binary tree node. 2 # class TreeNode: 3 # def __init__(self, val=0, left=None, right=None): 4 # self.val = val 5 # self.left = le 阅读全文