LeetCode101.Symmetric Tree 题目 Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree[1,2,2,3,4,4,3]is symmetric: 1 / \ 2 2 / \ / \ 3 4 4 3 But the following[1,2,2,null,3,null,3]is not: 1 / ...
Given the root of a binary tree, check whether it is a mirror of itself (i.e., symmetric around its center). Example 1: Input: root = [1,2,2,3,4,4,3] Output: true Example 2: Input: root = [1,2,2,null,3,null,3] Output: false 1.2 中文描述 给你一个二叉树,你要判断它是...
import java.util.Queue; /*class TreeNode { int val; TreeNode left; TreeNode right; TreeNode(int x) { val = x; } } */ public class Solution { public boolean isSymmetric(TreeNode root) { if(root==null) return true; Queue<TreeNode> myQueue = new LinkedList<>(); myQueue.add(root...
对称二叉树 - 领扣 (LeetCode)leetcode-cn.com/problems/symmetric-tree/ 方法一、递归: 如果一个树的左子树与右子树镜像对称,那么这个树是对称的。 因此,该问题可以转化为:两个树在什么情况下互为镜像? 如果同时满足下面的条件,两个树互为镜像: 它们的两个根结点具有相同的值。 每个树的右子树都与另一...
LeetCode 101. Symmetric Tree (Python), 视频播放量 75、弹幕量 0、点赞数 3、投硬币枚数 0、收藏人数 2、转发人数 1, 视频作者 Myron_yoo, 作者简介 ,相关视频:Leetcode 563. Binary Tree Tilt (Python),Leetcode 476. Number Complement (Python),Leetcode 1200. Min
publicclassLeetCode_101 {publicstaticbooleanisSymmetric(TreeNoderoot) {if (root==null|| (root.left==null&&root.right==null)) {returntrue; }returnisSymmetric(root.left, root.right); }publicstaticbooleanisSymmetric(TreeNodeleft, TreeNoderight) {if (left==null&&right==null) {returntrue...
* public class TreeNode{* int val; * TreeNode left; * TreeNode right; * TreeNode(int x){val = x;}**/publicclassSolution{publicbooleanisSymmetric(TreeNoderoot){if(root==null||(root.left==null&&root.right==null))returntrue;returnhelp(root.left,root.right);}// DFSprivatebooleanhelp(Tr...
Leetcode 101 Symmetric Tree (回溯 or 分治) Leetcode 951 Flip Equivalent Binary Trees (分治) Leetcode 236 Lowest Common Ancestor of a Binary Tree (相似题:235、1650) (回溯 or 分治) Leetcode 105 Construct Binary Tree from Preorder and Inorder Traversal (分治) Leetcode 104 Maximum Depth ...
101 Symmetric Tree Easy 102 Binary Tree Level Order Traversal Medium Go 104 Maximum Depth of Binary Tree Easy Go 105 Construct Binary Tree from Preorder and Inorder Traversal Medium Go 110 Balanced Binary Tree Easy 119 Pascal's Triangle II Easy Go 121 Best Time to Buy and Sell Stock Eas...
symmetric_tree_101 fix: imports to correct package Mar 28, 2020 template find_the_highest_altitude_1732: solved Aug 8, 2024 three_sum_15 docs: update readme Mar 28, 2020 time_based_key_value_store_981 time_based_key_value_store_981: solved ...