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 / ...
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...
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 1. 2. 3. 4. 5. But the following[1,2,2,null,3,null,3]is not: 1 / \ 2 2 ...
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...
2 101E - 对称树 Symmetric Tree 思路: 这里递归调用的是上题中的主函数(比较两棵树是否一样),而不是本题的主函数; 这里isSameTree 中的 p 和 q,相当于左子树和右子树,如果一棵树的左子树=右子树 且 右子树=左子树;那么两棵树镜面对称;
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...
leetcode 101 对称二叉树 symmetric-tree【ct】 === 思路: 注意这个退出条件 1. !l && !r return true 2. l?.val !== r?.val return false 3. !l || !r return false 1. 2. 3.
* public var right: TreeNode? * public init(_ val: Int) { * self.val = val * self.left = nil * self.right = nil * } * } * */classSymmetricTree{funcisSymmetric(_root:TreeNode?)->Bool{guardletroot=rootelse{returntrue}returnisSymmetricHelper(root.left,root.right)}privatefuncisSymmetr...
Binary Tree Con.(6) Structure of Tree100 Same Tree101 Symmetric Tree965 Univalued Binary Tree958 Check Completeness of a Binary Tree951 Flip Equivalent Binary Trees(7) SubTree/Leaves222 Count Compl...