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LeetCode 0102. Binary Tree Level Order Traversal二叉树的层次遍历【Medium】【Python】【BFS】 Problem LeetCode Given a binary tree, return thelevel ordertraversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree[3,9,20,null,null,15,7], 3 ...
Given a binary tree, return thebottom-up level ordertraversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For example: Given binary tree[3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 1. 2. 3. 4. 5. return its bottom-up level orde...
Leetcode: Binary Tree Level Order Traversal II 题目: Given a binary tree, return thebottom-up level ordertraversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For example: Given binary tree {3,9,20,#,#,15,7}, AI检测代码解...
这道题和LeetCode笔记:107. Binary Tree Level Order Traversal II是姊妹题,解题思路都是一样的,只是结果要求的顺序是反的,同样有两种方法,也就是经常说到的DFS深度优先遍历和BFS广度优先遍历。 BFS: 广度优先遍历就是一层层地攻略过去,把每一层的所有节点都记录下来再走向下一层。因为每层会有多个节点,不是简...
Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree [3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 return its level order traversal as: ...
return its bottom-up level order traversal as: [ [15,7], [9,20], [3] ] 中文理解:层次遍历二叉树,并将每一层的节点保存在一个动态数组里面,所有层的遍历结果组成一个大动态数组,同时二叉树层数越低则在最终的结果中顺序越靠后。 解题思路:使用递归的方法,每一层有一个变量level从0开始记录层数,一次...
LeetCode Binary Tree Level Order Traversal II LeetCode解题之Binary Tree Level Order Traversal II 原题 实现树的广度优先遍历的倒序遍历。即从最底层依次向上遍历,每一层上的数据依照从左到右的顺序排列。 注意点: 无 样例: 输入: 输出: 解题思路 直接复用了 Binary Tree Level Order Traversal 的代码。
Binary Tree Zigzag Level Order Traversal.md Verified 4300b6d colorbox mentioned this pull request Mar 1, 2025 103. Binary Tree Zigzag Level Order Traversal colorbox/leetcode#41 Open Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment ...
BinaryTreeLevelOrderTraversal.java 源码 package datastructure.tree.leetcode; import java.util.ArrayList; import java.util.LinkedList; import java.util.List; import java.util.Queue; /** * @author roseduan * @time 2020/9/20 1:56 上午 * @description 二叉树的层次遍历 */ public class BinaryTree...