Given a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). For example: Given binary tree{3,9,20,#,#,15,7}, 3 / \ 9 20 / \ 15 7 return its zigzag level order travers...
Given a binary tree,returnthe zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between).For example: Given binary tree [3,9,20,null,null,15,7],3 /\9 20 /\15 7returnits zigzag level order traversal as...
LeetCode—103. Binary Tree Zigzag Level Order Traversal 题目 https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/description/ 之字形层序遍历二叉树。 思路及解法 因为昨天刚做过层序遍历二叉树的题102. Binary Tree L... 查看原文 ...
return its zigzag level order traversal as: [ [3], [20,9], [15,7] ] 题目大意: 按照 “之字形” 层次遍历二叉树。 解题思路 方法一: 使用 LeetCode: 102. Binary Tree Level Order Traversal 的方法。在偶数次写入时,翻转写入的序列。 方法二: 使用两个栈存每行的数据,奇数行先...
[Leetcode][python]Binary Tree Zigzag Level Order Traversal,题目大意按之字形遍历二叉树(一正一反)解题思路来自:链接解题思路:这道题和上一题层序遍历那道题差不多,区别只是在于奇数层的节点要翻转过来存入数组。代码:代码BFSclassSolution(object):defzigzagLeve
来自专栏 · LeetCode刷题 题目描述(中等难度) 和102 题 类似,二叉树的层次遍历。只不过这题要求,第 1 层从左到右,第 2 层从右到左,第 3 层从左到右,第 4 层从右到左,交替进行。 思路分析 大家可以先做下 102 题 吧,直接在 102 题的基础上进行修改即可。从左到右和从右到左交替,所以我们只需要...
Binary Tree Zigzag Level Order Traversal Given a binary tree, return thezigzag level ordertraversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). For example: Given binary tree{3,9,20,#,#,15,7}, ...
LeetCode上第103 号问题:二叉树的锯齿形层次遍历 题目 给定一个二叉树,返回其节点值的锯齿形层次遍历。(即先从左往右,再从右往左进行下一层遍历,以此类推,层与层之间交替进行)。 例如: 给定二叉树: [3,9,20,null,null,15,7], 返回其层次遍历结果: [ [3], [20,9], [15,7] ] 解题思路 ...
LeetCode: 103_Binary Tree Zigzag Level Order Traversal | 二叉树Zigzag层次遍历 | Medium 简介:本题也属于层次遍历的变形,不同之处在于其遍历的方法是交替进行的,形成一个ZigZag的曲线形式,如下: 代码如下: 1 struct TreeNode { 2 int val; 3 TreeNode* left; 4 ......
Leetcode solution 103: Binary Tree Zigzag Level Order Traversal Blogger:https://blog.baozitraining.org/2019/10/leetcode-solution-103-binary-tree.html Youtube: https://youtu.be/ItSAlpdSJtw 博客园: https://www.cnblogs.com/baozitraining/p/11606750.html B站: https://www.bilibili.com/video/av69...