/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ public class Solution { public boolean isSameTree(TreeNode p, TreeNode q) { if(p==null|| q==null) r…

Same Tree 题目 给予两棵二叉树,判断这两棵树是否相等(即各节点的值都一样) 解题思路 分别遍历两棵二叉树,并用列表分别存储这两棵树的节点的值,比较这两个列表就可以了 class Solution: # @param {TreeNode} p # @param {TreeNode} q # @return {boolean} def isSameTree(self, p, q): if (not p) and (not q): return True if (not p) and q:…

Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. 思路:如果两个树相同,那么他们的左子树.右子树必定也相同=>递归=>可用前序.中序或后续遍历. 以下用的是前序遍历,先处理根节点.…

https://leetcode.com/problems/same-tree/ 题目: Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. 思路:  DFS AC代码: 1.递归 /…

题目 Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. 分析 判断两个二叉树是否相同. 采用递归的思想,当节点关键字以及左右子树均相同时,此两颗二叉树才相同: AC代码 /** *…

Given two binary trees, write a function to check if they are the same or not. Two binary trees are considered the same if they are structurally identical and the nodes have the same value. 即为判断两颗二叉树是否相同.输入是用数组表示的二叉树. 对于图中的树,它的编号是这样的:A(1)B(2)C(3)D(4)…

https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/ Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined…

1.Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 2.Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 这里两道题目.是连在一起的两题.给你一个排好序(升序)的数组或者链表,将它们…

Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's key.    The right subtree of a node contains only nodes with k…

Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree is symmetric: 1 / \ 2 2 / \ / \ 3 4 4 3 But the following is not: 1 / \ 2 2 \ \ 3 3 Note: Bonus points if you could solve it…

Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more than 1. struct TreeNode { int val; TreeNode…

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. class Solution { public: int maxDepth(TreeNode *root) { ; max_depth = ; dfs(root,); return…

Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. struct TreeNode { int val; TreeNode *left; TreeNode *right; TreeNode(int x) : val(x), left…

Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Note: A solution using O(n) space is pretty straight forward. Could you devise a constant space solution?   法I:BST的中序遍历结果是递增序列.把这个递增序列…

Recover the tree without changing its structure. Note: A solution using O(n) space is pretty straight forward. Could you devise a constant space solution? confused what "{1,#,2,3}" means? > read more on how binary tree is serialized on OJ. 3…

题面 对比两棵二叉树是否相同,返回结果. 思路 1. 递归解决DFS 首先判断根节点,如果都空,返回true: 如果一空一不空,返回false: 如果都不空,判断两节点值是否相同,若不同,返回false,若相同,递归左子树.右子树 源码 /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : va…

╰(￣▽￣)╭ 每个非叶子节点,其左右子树叶子节点的权值之和相等.我们称这种二叉树叫平衡二叉树. 我们将一棵平衡二叉树叶子节点的权值从左到右列出来,假如这个权值序列是另一个序列A的子序列,我们称这棵平衡二叉树"隐藏"在序列A当中.在本题中,我们称一个序列S2是另一个序列S1的子序列,当且仅当S2可以由S1中删除0个或多个元素,但不改变S1中剩余元素的相对位置获得. 你的任务是对给定的整数序列,寻找当中隐藏的具有最多叶子节点的平衡二叉树. n<=1000,1<=ai<=…

Range Search (kD Tree) The range search problem consists of a set of attributed records S to determine which records from Sintersect with a given range. For n points on a plane, report a set of points which are within in a given range. Note that you…

关于tree菜单生成,参考我的另一篇博文地址tree 菜单 实现功能:点击左侧tree菜单中的table,右侧通过datagrid加载出该表对用的所有数据 难点:获取该表的所有列名,动态生成datagrid,并加载数据 解决办法:     使用tree菜单的onClick事件: $('#tree').tree( { url:'tree_getData.php', onClick:function(node){ //判断点击的节点是否是子节点是子节点就创建datagrid,否则就return打开这…

<!DOCTYPE html> <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <% String contextPath = request.getContextPath(); %> <html> <head> <meta http-equiv="…

树形DP.... Tree of Tree Time Limit: 1 Second      Memory Limit: 32768 KB You're given a tree with weights of each node, you need to find the maximum subtree of specified size of this tree. Tree Definition A tree is a connected graph which contains no c…

二叉树 在计算机科学中,二叉树是每个结点最多有两个子树的有序树.通常子树的根被称作“左子树”(left subtree)和“右子树”(right subtree).二叉树常被用作二叉查找树和二叉堆或是二叉排序树.二叉树的每个结点至多只有二棵子树(不存在出度大于2的结点),二叉树的子树有左右之分,次序不能颠倒.二叉树的第i层至多有2的 i -1次方个结点:深度为k的二叉树至多有2^(k) -1个结点:对任何一棵二叉树T,如果其终端结点数(即叶子结点数)为,出度为2的结点数为,则=+ 1. 基本形态…

Problem Description As we know,the shape of a binary search tree is greatly related to the order of keys we insert. To be precisely: 1. insert a key k to a empty tree, then the tree become a tree with only one node; 2. insert a key k to a nonempty tr…

关于easy ui 异步加载生成树及点击树生成选项卡,这里直接给出代码,重点部分代码中均有注释 前台: $('#tree').tree({ url: '../servlet/School_Tree?id=-1', //向后台传送id,获取根节点 lines:true, onBeforeExpand:function(node,param){ $('#tree').tree('options').url = "../servlet/School_Tree?id=" + node.id;…

Given a binary tree with N nodes, each node has a different value from {1, ..., N}. A node in this binary tree can be flipped by swapping the left child and the right child of that node. Consider the sequence of N values reported by a preorder traver…

专业版1.6下载地址(CSDN) http://download.csdn.net/source/1388340 版本号:dhtmlxTree v.1.6 Professional edition build 71114 最近开发项目使用到了dhtmlXtree做权限设置,看了网上相关的中文资料很少,就把官方的资料翻译了下,一共分2部分,API可以参考官方文档:http://dhtmlx.com/docs/download.shtml 效果图如下(三态树): dhtmlXTree 指南与实例 主…

1.效果: 2.html  代码: <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>layui</title> <meta name="renderer" content="webkit"> <meta http-equiv="X-UA-Compatible" con…

Description 一棵n个点的树.每一个点的初始权值为1. 对于这棵树有q个操作,每一个操作为下面四种操作之中的一个: + u v c:将u到v的路径上的点的权值都加上自然数c: - u1 v1 u2 v2:将树中原有的边(u1,v1)删除,增加一条新边(u2,v2),保证操作完之后仍然是一棵树: * u v c:将u到v的路径上的点的权值都乘上自然数c: / u v:询问u到v的路径上的点的权值和.求出答案对于51061的余数. Input 第一行两个整数n,q 接下来n-1行每行两个正…

The order of a Tree Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 835    Accepted Submission(s): 453 Problem Description As we know,the shape of a binary search tree is greatly related to the…

网上有下过其它人的实现的样例.可是样式不好改.还有就是不能初始化选中,还有三态效果那个半选中状态也是不清楚.所以自己依据Itemrender搞了一个,还凑合 效果如图:全选和半选状态,Checkbox的flex3的样式用的图片 watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvc29uZ2FubGluZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" a…