Given two non-empty binary trees s and t, check whether tree t has exactly the same structure and node values with a subtree of s. A subtree of s ...
Given the root of a tree, you are asked to find the most frequent subtree sum. The subtree sum of a node is defined as the sum of all the node values formed by the subtree rooted at that node includi ...
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Given two non-empty binary trees s and t, check whether tree t has exactly the same structure and node values with a subtree of s. A subtree of s ...
Given a binary tree, find the largest subtree which is a Binary Search Tree (BST), where largest means subtree with largest number of nodes in it. ...
Given a binary tree rooted at `root`, the *depth* of each node is the shortest distance to the root ...
前段时间接触的这个题目,大体理解了,还有些小地方仍待进一步品味,暂且记下。 原文:http://www.2cto.com/kf/201205/133219.html,此处略有改动 ...
Jieba是一个中文分词组件,可用于中文句子/词性分割、词性标注、未登录词识别,支持用户词典等功能。 Matplotlib是Python中最常用的可视化工具之一,可以非常方便地创建海量类型的 ...
Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). ...