Leetcode965. Univalued Binary Tree单值二叉树

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Leetcode965. Univalued Binary Tree单值二叉树

如果二叉树每个节点都具有相同的值,那么该二叉树就是单值二叉树. 只有给定的树是单值二叉树时,才返回 true:否则返回 false. 示例 1: 输入:[1,1,1,1,1,null,1] 输出:true 示例 2: 输入:[2,2,2,5,2] 输出:false 提示: 给定树的节点数范围是 [1, 100]. 每个节点的值都是整数,范围为 [0, 99] . class Solution { public: int val = -1; bool isUnivalTree(TreeNode*…

遍历二叉树 traversing binary tree 线索二叉树 threaded binary tree 线索链表线索化

遍历二叉树 traversing binary tree 线索二叉树 threaded binary tree 线索链表线索化 1. 二叉树3个基本单元组成:根节点.左子树.右子树以L.D.R分别表示遍历左子树.访问根节点.遍历右子树可能的情况6种排列A3 2 LDR LRD DLR DRL RLD RDL 若限定先左后右 LDR LRD 中根序遍历后根序遍历 DLR 先根序遍历先/中/后序遍历…

[LintCode] Invert Binary Tree 翻转二叉树

Given n points on a 2D plane, find the maximum number of points that lie on the same straight line. Example Given 4 points: (1,2), (3,6), (0,0), (1,3). The maximum number is 3. LeeCode上的原题,可参见我之前的博客Invert Binary Tree 翻转二叉树. 解法一: // Recursion class So…

965. Univalued Binary Tree

题目来源: https://leetcode.com/problems/univalued-binary-tree/submissions/ 自我感觉难度/真实难度: 题意: 分析: 自己的代码: class Solution(object): def isUnivalTree(self, root): """ :type root: TreeNode :rtype: bool """ return self.dsf(root.val,root)…

【LeetCode-面试算法经典-Java实现】【104-Maximum Depth of Binary Tree（二叉树的最大深度）】

[104-Maximum Depth of Binary Tree(二叉树的最大深度)] [LeetCode-面试算法经典-Java实现][全部题目文件夹索引] 原题 Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. 题目大意给…

【Leetcode_easy】965. Univalued Binary Tree

problem 965. Univalued Binary Tree 参考 1. Leetcode_easy_965. Univalued Binary Tree; 完…

[Swift]LeetCode965. 单值二叉树 | Univalued Binary Tree

A binary tree is univalued if every node in the tree has the same value. Return true if and only if the given tree is univalued. Example 1: Input: [1,1,1,1,1,null,1] Output: true Example 2: Input: [2,2,2,5,2] Output: false Note: The number of nodes i…