leetcode system design questions

[146] LRU Cache [155] min Stack [170] Two sum III-Data Structure Design [173] Binary Search Tree iterator [208] implement trie (Prefix Tree) [211] add and search word-Data Structure Design [225] implement stack using queues [232] implement queue using stacks [2, 244] shortest word distance II [2, 251] flatten 2D Vector [281] zigzag iterator [284] peeking iterator [1, 288] Unique Word abbreviation [2, 295] F

expansion:Heap Hash-heap with DeleteTrapping Rain waterBuilding Outline· Median Problem Development· Sliding Windows Issues Summary· Double-ended Queue deque4th two Pointers two pointers· Pair of hit-type hands1. The Sum class2. Partition class· Forward Type pointer1. Window class2. Speed Class· Two pointers on an arrayThe 5th Chapter Dynamic Planning (Upper)· Memory Search (interval dynamic programming, game dynamic programming)· Dynamic planning of Knapsack class· Dynamic programming of Inter

System design changes and changes (answer questions about golden ocean) The scope of our discussion is to design database-based applications. There are still many applications that will not be implemented based on databases, so we will not discuss them for the moment,In the previous discussions on hierarchical

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Analysis of Three tricky Leetcode interview questions Recently, when I was idle, I click the Leetcode question to do it. I found that some questions are quite interesting and tricky. In the following three questions, each question seems so easy at the beginning! However, aft

(n = =0) {returnNULL;} +Vectorptr (n, NULL); A for(inti =0; I i) { atPtr[i] =Lists[i]; - } -ListNode *head =0, *tail =0; -priority_queuePQ; - for(inti =0; I i) { - if(!ptr[i]) {Continue;}//Note that there is a possibility that the node of the list header is empty, in Pq.push (Ptr[i]); -Ptr[i] = ptr[i]->Next; to } + while(!Pq.empty ()) { -listnode* node =pq.top (); the Pq.pop (); * if(Node->next) {Pq.push (node->next); } $

Windows program design review notes (77 questions in total), Program Design 77Windows program design review notes (77 questions) (Personal finishing, only do review with: D, reprinted with the source: http://blog.csdn.net/hcbbt/article/details/42706501) Knowledge Point Wha

. NET domain driven design-first taste (one: questions, patterns, principles, tools, processes, frameworks, practices)2013-04-07 17:35:27Tags:. NET DDD Driver Design original works, allow reprint, please be sure to use hyperlinks in the form of the original source of the article, author information and this statement. Otherwise, the legal liability will be invest

unique URLs? Should the identifier is increment or not? Which is easier to design? Pros and cons? Mapping an identifier to a URL and its reversal-does This problem ring a bell? How does you store the URLs? Does a simple flat the file database work? What is the bottleneck of the system? Is it read-heavy or write-heavy? Estimate the maximum number of URLs a single machine can store. E

URLs? Should the identifier is increment or not? Which is easier to design? Pros and cons? Mapping an identifier to a URL and its reversal-does This problem ring a bell? How does you store the URLs? Does a simple flat the file database work? What is the bottleneck of the system? Is it read-heavy or write-heavy? Estimate the maximum number of URLs a single machine can store. Estimate the m

Web Design and Production questions The first part of the selection problemOne, the single choice question (this big question altogether 20 small questions, each small question 1 points, altogether 20 points. In each of the four alternative answers to the quiz, choose a correct answer and fill in the blanks with the correct answers.1. The most widely used servic

Detailed explanation of soft exam afternoon questions --- data flow diagram design, soft exam Data Flow Five main questions in the afternoon of the soft exam over the years are data flow diagram design, database design, uml diagram, algorithm, and

, so there are many restrictions on the UI Designer. From the current planning, we hope to have two voices on the responsibilities of the UI Designer: 1. Plan based on existing work; Advantage: The risk is low, but the development manager and architect need to be responsible for more work. 2. Let the UI Designer complete the uidesign of the product independently, including understanding the user requirements, designing a good user experience, and facilitating

LeetCode: LRU Cache DesignDescription: Design and implement a data structure for Least Recently Used (LRU) cache. it shoshould support the following operations: get and set. get (key)-Get the value (will always be positive) of the key if the key exists in the cache, otherwise return-1.set( key, value) -Set or insert the value if the key is not already present. when the cache reached its capacity, it shocoul

Design a Phone Directory which supports the following operations: get: Provide a number which is not assigned to anyone. check: Check If a number is available or not. release: Recycle or release a number. Example:Init a phone directory containing a total of 3 numbers:0, 1, and 2.PhoneDirectory directory = new Phonedirectory (3);// It can return any available phone number. Here we assume it returns 0.directory.get ();//Assume it

Django Data facility layer is very perfect, to directly do the interaction layer, Code volume is also very small, but in the process of product system constantly bloated, the scale and structure of the system constantly complicate the process, the system structure management requirements will gradually emerge, this time on the business layer independent implemen

inheritance.2.5 do not overwrite a member function that cannot be overwritten ? Both C ++ and Java allow programmers to "override" member functions that cannot be covered. If a member function is private in the base class, its derived class can create a member function with the same name. This function is confusing for programmers who want to read the code of a derived class, because it seems to be a multi-state function, but in fact it is missing, but it is just the same name.2.6 place shared

Based on asp, jsp, java, vb and other computer science Graduation Design Questions Daquan, jspvb I found a lot and found it was a part of it. Many of them were incomplete. Then I sorted them through the network. If I was interested, I could leave my mailbox to send them. I have not found a place where I can upload objects.Paste two images. One is 36 pages in the document, covering most of the professional

Good questions about object-oriented analysis and design. it may take some time for the younger brother to get in touch with object-oriented design. every time you design a new system, you will encounter problems about how to split and d