2017年11月2日
107. Binary Tree Level Order Traversal II
摘要： Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For 阅读全文
posted @ 2017-11-02 22:22 乐乐章 阅读(168) 评论(0) 推荐(0)
226. Invert Binary Tree(反转二叉树，递归)
摘要： Invert a binary tree. 4 / \ 2 7 / \ / \ 1 3 6 9 to 4 / \ 7 2 / \ / \ 9 6 3 1 Trivia:This problem was inspired by this original tweet by Max Howell: Go 阅读全文
posted @ 2017-11-02 20:49 乐乐章 阅读(129) 评论(0) 推荐(0)