目录

检查平衡性

目录

检查平衡性

题目:

https://leetcode-cn.com/problems/check-balance-lcci/

思路:

算深度,然后作差是否大于1

代码:

# Definition for a binary tree node.
# class TreeNode:
#     def __init__(self, x):
#         self.val = x
#         self.left = None
#         self.right = None

class Solution:
    def isBalanced(self, root: TreeNode) -> bool:
        if self.maxdepth(root) < 1:
            return True
        if abs(self.maxdepth(root.left) - self.maxdepth(root.right)) > 1:
            return False
        return self.isBalanced(root.right) and self.isBalanced(root.left)


    def maxdepth(self,root):
        if not root:
            return 0
        return 1 + max(self.maxdepth(root.right),self.maxdepth(root.left))