leetcode-explore-learn-數據結構-二叉樹3
本系列博文為leetcode-explore-learn子欄目學習筆記,如有不詳之處,請參考leetcode官網:https://leetcode-cn.com/explore/learn/card/data-structure-binary-tree/2/traverse-a-tree/7/
所有例題的編程語言為python
二叉樹節點結構:
class TreeNode(object):def __init__(self, x):self.val = xself.left = Noneself.right = None