leetcode之旅第3页

LeetCode之旅（17）-Ugly Number

题目：Writeaprogramtocheckwhetheragivennumberisanuglynumber. Uglynumbersarepositivenumberswhoseprimefactorsonlyinclude2,3,5.Forexample,6,8areuglywhile14isnotuglysinceitincludesanotherprimefactor7. Note

u010321471·2016-04-03 16:00

LeetCode之旅（16）-Climbing Stairs

题目描述：Youareclimbingastaircase.Ittakesnstepstoreachtothetop.Eachtimeyoucaneitherclimb1or2steps.Inhowmanydistinctwayscanyouclimbtothetop?先验知识：斐波那契数列斐波那契数列（Fibonaccisequence），又称黄金分割数列、因数学家列昂纳多·斐波那契（Leona

u010321471·2016-03-31 12:00

LeetCode之旅（15）-Odd Even Linked List

题目描述：Givenasinglylinkedlist,groupalloddnodestogetherfollowedbytheevennodes.Pleasenoteherewearetalkingaboutthenodenumberandnotthevalueinthenodes.#Youshouldtrytodoitinplace.TheprogramshouldruninO(1)spac

u010321471·2016-03-31 09:00

leetCode之旅（14）-Number of 1 Bits

题目描述：Writeafunctionthattakesanunsignedintegerandreturnsthenumberof’1’bitsithas(alsoknownastheHammingweight).Forexample,the32-bitinteger’11’hasbinaryrepresentation00000000000000000000000000001011,sothe

u010321471·2016-03-30 19:00

LeetCode之旅（13）-Valid Anagram

题目介绍：Giventwostringssandt,writeafunctiontodetermineiftisananagramofs.Forexample,s=“anagram”,t=“nagaram”,returntrue.s=“rat”,t=“car”,returnfalse.Note:Youmayassumethestringcontainsonlylowercasealphabets.

u010321471·2016-03-30 18:00

leetCode之旅（12）-反转二叉树

背景描述Homebrew是OSX平台上的包管理工具。用其官网的话说就是：themissingpackagemanagerforOSX|OSX平台遗失的包管理器。相信在用Mac的程序员，差不多都知道Homebrew。Homebrew的开发者是MaxHowell。今天Max在推特发帖：Google:90%ofourengineersusethesoftwareyouwrote(Homebrew),bu

u010321471·2016-03-30 17:00

leetcode之旅（11）-Integer to Roman

Subscribetoseewhichcompaniesaskedthisquestion ShowTags ShowSimilarProblems 准备知识看上篇博客leetcode之旅（10）-Roma

u010321471·2016-03-29 23:00

leetcode之旅（10）-Roman to Integer

题目描述：Givenaromannumeral,convertittoaninteger. Inputisguaranteedtobewithintherangefrom1to3999. Subscribetoseewhichcompaniesaskedthisquestion预备知识：记数方法基本字符IVXLCDM相应的阿拉伯数字表示为15105010050010001、相同的数字连写，所表

u010321471·2016-03-29 22:00

leetcode之旅（9）-Reverse Linked List

题目描述：Reverseasinglylinkedlist. clicktoshowmorehints. Hint: Alinkedlistcanbereversedeitheriterativelyorrecursively.Couldyouimplementboth? Subscribetoseewhichcompaniesaskedthisquestion分析：注意这个数据结构，这是一

u010321471·2016-03-29 21:00

leetcode之旅（8）-Contains Duplicate

题目：Givenanarrayofintegers,findifthearraycontainsanyduplicates.Yourfunctionshouldreturntrueifanyvalueappearsatleasttwiceinthearray,anditshouldreturnfalseifeveryelementisdistinct. Subscribetoseewhichco

u010321471·2016-03-29 21:00

leetcode之旅（7）-Move Zeroes

MoveZeroes题目描述：Givenanarraynums,writeafunctiontomoveall0'stotheendofitwhilemaintainingtherelativeorderofthenon-zeroelements. Forexample,givennums=[0,1,0,3,12],aftercallingyourfunction,numsshouldbe[1,

u010321471·2016-03-29 20:00

leetcode之旅（6）-Add Digits

题目：Givenanon-negativeintegernum,repeatedlyaddallitsdigitsuntiltheresulthasonlyonedigit. Forexample: Givennum=38,theprocessislike:3+8=11,1+1=2.Since2hasonlyonedigit,returnit. Followup: Couldyoudoitw

u010321471·2016-03-29 17:00

leetCode之旅（5）-博弈论中极为经典的尼姆游戏

题目介绍YouareplayingthefollowingNimGamewithyourfriend:Thereisaheapofstonesonthetable,eachtimeoneofyoutaketurnstoremove1to3stones.Theonewhoremovesthelaststonewillbethewinner.Youwilltakethefirstturntoremov