airforce

摘要： Problem:Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as theHamming weight).For example, the 3... 阅读全文

摘要： Problem:Design a data structure that supports the following two operations:void addWord(word)bool search(word)search(word) can search a literal word o... 阅读全文

摘要： Problem:Given two words (startandend), and a dictionary, find all shortest transformation sequence(s) fromstarttoend, such that:Only one letter can be... 阅读全文

摘要： Problem:Given two words (beginWordandendWord), and a dictionary, find the length of shortest transformation sequence frombeginWordtoendWord, such that... 阅读全文

摘要： Problem:Find the total area covered by tworectilinearrectangles in a2Dplane.Each rectangle is defined by its bottom left corner and top right corner a... 阅读全文

摘要： Problem:Implement a trie withinsert,search, andstartsWithmethods.Note:You may assume that all inputs are consist of lowercase lettersa-z.Analysis:This... 阅读全文

摘要： Problem:Given a 2D board and a list of words from the dictionary, find all words in the board.Each word must be constructed from letters of sequential... 阅读全文

摘要： Problem:There are a total ofncourses you have to take, labeled from0ton - 1.Some courses may have prerequisites, for example to take course 0 you have... 阅读全文

摘要： Problem:There are a total ofncourses you have to take, labeled from0ton - 1.Some courses may have prerequisites, for example to take course 0 you have... 阅读全文

摘要： Problem:Given an array of numbersnums, in which exactly two elements appear only once and all the other elements appear exactly twice. Find the two el... 阅读全文