题解 | #牛群的最大高度#

# class TreeNode:
#     def __init__(self, x):
#         self.val = x
#         self.left = None
#         self.right = None
#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param root TreeNode类 
# @return int整型
#
from collections import deque
class Solution:
    def findMaxHeight(self , root: TreeNode) -> int:
        # write code here
        q = deque([root])
        res = 0
        while q:
            node = q.popleft()
            if node.left:
                q.append(node.left)
            if node.right:
                q.append(node.right)
            res = max(res, node.val)
        return res