"Top-down" Solution Here is the pseudocode for the recursion function maximum_depth(root, depth): 1. return if root is null 2. if root is a leaf node: 3. answer = max(answer, depth) // update the answer if needed 4. maximum_depth(root.left, dept…

Tapiwa Chiwewe: You don't have to be an expert to solve big problems Collection noticed a haze hanging over the city/Johannesburg is known for its distinctive skyline, which I could barely see that morning./Even if you're not an expert in a particula…

Every dynamic programming algorithm starts with a grid. It entails solving subproblems and builds up to solving the big problem. Let’s break down a problem and solve it in pieces using dynamic programming with JavaScript. /** * 给一个浮点数序列,取最大乘积连续子串的值,例…

[HDU] 1213 - How Many Tables [基础并查集,求父节点个数] 1856 -More is better [基础并查集,注意内存,HDU数据水了,不用离散化,注意路径压缩的方式就好]代码链接:http://blog.csdn.net/catherinetang0919/article/details/24815507 1232--畅通工程---[基础并查集,没什么好说的,最基础的题,代码就免了,小小纪念一下,十分钟内写好代码然后1A] 1102-Constructing…

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 b…

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 / \ 2 2 \ \ 3 3 Not…

题目大意 #!/usr/bin/env python # coding=utf-8 # Date: 2018-08-30 """ https://leetcode.com/problems/symmetric-tree/description/ 101. Symmetric Tree Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). Fo…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 DFS BFS 日期 [LeetCode] 题目地址:https://leetcode.com/problems/symmetric-tree/ Total Accepted: 106639 Total Submissions: 313969 Difficulty: Easy 题目描述 Given a binary tree, check wheth…

题目链接:Symmetric Tree | LeetCode OJ 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: B…

Symmetric Tree 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 c…