BST to double linkedlist in inorder traversal sequenceFollow Up: 如果这个BST自带prev, next, 给一个value,插进去这个node,并补全left,right,prev,next class TreeNode { public int val; TreeNode left; TreeNode right; } TreeNode newRoot TreeNode tree2Dll(TreeNode root) { Tre…

引言 本文来自于Google的一道题目: how to merge two binary search tree into balanced binary search tree. how to merge two binary search tree into balanced binary search tree.. Let there be m elements in first tree and n elements in the other tree. Your merge funct…

package DFS; import java.util.ArrayList; import java.util.HashMap; import java.util.LinkedList; import java.util.List; import java.util.Map; import java.util.PriorityQueue; import java.util.Stack; public class RealDFS { public static void main(String…

Bridge Pattern, Composite Pattern, Decorator Pattern, Facade Pattern, COR Pattern, Proxy Pattern, template Pattern, MVC. Updated with the explanation of Composite pattern, Decorator Pattern and Template Pattern. Design Pattern Interview Question - Pa…

前记: 大二学 Java 的时候写的,现在贴上来,只为留念. 再翻代码,自己看着都头疼.一重重的 if 嵌套,当时写得费劲,现在看着更费劲. 代码思想: 代码的大致思想是这样: 首先定义一个算式字符串.然后用户通过键盘或鼠标点击按钮输入字符,添加到算式字符串末尾.在每次用户输入字符之后,先判断该字符是否符合算式语法规则(如加号后不能再跟加号),不符合语法规则的字符不添加到算式字符串末尾.如果用户输入了等号,则进行计算并将计算结果显示出来. 其中计算过程如下: 首先将字符串转化为两个链表,一个存储…

Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already present. remove(val): Removes an item val from the set if present. getRandom: Returns a random element fro…

SGI -- Silicon Graphics[Computer System] Inc.硅图[计算机系统]公司. STL -- Standard Template Library 标准模板库.   容器的概念 所谓STL容器,即是将最常运用的一些数据结构(data structures)实现出来. 容器是指容纳特定类型对象的集合.依据数据在容器中排列的特性,容器可概分为序列式(sequence)和关联式(associative)两种. 迭代器是一种检查容器内元素并遍历元素的数据类型.它提供类似…

题目: Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n). For example,S = "ADOBECODEBANC"T = "ABC" Minimum window is "BANC". Note:If there is no such wind…

原文地址: https://software.intel.com/en-us/articles/enhancing-the-scalability-of-memcached-0 1 Introduction - Memcached and Web Services Memcached is a Key-Value cache used by cloud and web service delivery companies, such as Facebook [1], Twitter [2], R…

STL六大组件 1.容器(container):各种数据结构,如vector,list,deque,set,map等 2.算法(algorithm):各种常用算法如sort,search,copy,erase等 3.迭代器(iterator):扮演容器与算法之间的胶着剂.所以STL容器都附带有自己专属的迭代器.指针也是一种迭代器. 4.仿函式(functors):行为类似函数,可作为算法的某种策略,从实现的角度讲,仿函式是一种重载了operator()的class或class template.…