144. Binary Tree Preorder Traversal
摘要：
Given a binary tree, return the preorder traversal of its nodes' values. Example: My idea:ricursion OTHERS:iretator 阅读全文
posted @ 2019-05-13 21:46 imyourterminal 阅读(155) 评论(0) 推荐(0) 编辑
