[综合] LeetCode 219. Contains Duplicate II

ContainsDuplicateII 题目描述: Givenanarrayofintegersandanintegerk,findoutwhethertherearetwodistinctindicesiandjinthearraysuchthatnums[i]=nums[j]andtheab...

[综合] LeetCode 448. Find All Numbers Disappeared in an Array

FindAllNumbersDisappearedinanArray 题目描述: Givenanarrayofintegerswhere1≤a[i]≤n(n=sizeofarray),someelementsappeartwiceandothersappearonce. Findalltheel...

[综合] LeetCode 442. Find All Duplicates in an Array

FindAllDuplicatesinanArray 题目描述: Givenanarrayofintegers,1≤a[i]≤n(n=sizeofarray),someelementsappeartwiceandothersappearonce. Findalltheelementsthatap...

[综合] LeetCode 605. Can Place Flowers

CanPlaceFlowers 题目描述: Supposeyouhavealongflowerbedinwhichsomeoftheplotsareplantedandsomearenot.However,flowerscannotbeplantedinadjacentplots-theywoul...

[综合] LeetCode 661. Image Smoother

ImageSmoother 题目描述: Givena2DintegermatrixMrepresentingthegrayscaleofanimage,youneedtodesignasmoothertomakethegrayscaleofeachcellbecomestheaveragegra...

[综合] LeetCode 665. Non-decreasing Array

Non-decreasingArray 题目描述: Givenanarraywithnintegers,yourtaskistocheckifitcouldbecomenon-decreasingbymodifyingatmost1element. Wedefineanarrayisnon-dec...

[综合] LeetCode 667. Beautiful Arrangement II

BeautifulArrangementII 题目描述: Giventwointegersnandk,youneedtoconstructalistwhichcontainsndifferentpositiveintegersrangingfrom1tonandobeysthefollowing...

[综合] LeetCode 39. Combination Sum

CombinationSum 题目描述: Givenasetofcandidatenumbers(C)(withoutduplicates)andatargetnumber(T),findalluniquecombinationsinCwherethecandidatenumberssumsto...

[综合] LeetCode 40. Combination Sum II

CombinationSumII 题目描述: Givenacollectionofcandidatenumbers(C)andatargetnumber(T),findalluniquecombinationsinCwherethecandidatenumberssumstoT. Eachnum...

[综合] LeetCode 216. Combination Sum III

CombinationSumIII 题目描述: Findallpossiblecombinationsofknumbersthatadduptoanumbern,giventhatonlynumbersfrom1to9canbeusedandeachcombinationshouldbeauni...

[综合] LeetCode 142. Linked List Cycle II

LinkedListCycleII 题目思路 判断给定链表中是否存在环，如果存在环返回环的起点。 参考这篇文章。 题目代码: /***Definitionforsingly-linkedlist.*structListNode{*intval;*ListNode*next;*ListNode(...

[综合] LeetCode 290. Word Pattern

WordPattern 题目描述: Givenapatternandastringstr,findifstrfollowsthesamepattern. Herefollowmeansafullmatch,suchthatthereisabijectionbetweenaletterinpatte...

[综合] LeetCode 409. Longest Palindrome

LongestPalindrome 题目描述: Givenastringwhichconsistsoflowercaseoruppercaseletters,findthelengthofthelongestpalindromesthatcanbebuiltwiththoseletters. T...

[综合] PAT - 甲级 - 1079. Total Sales of Supply Chain (25)（DFS,遍历树）

Asupplychainisanetworkofretailers（零售商）,distributors（经销商）,andsuppliers（供应商）--everyoneinvolvedinmovingaproductfromsuppliertocustomer. Startingfromoneroo...

[综合] PAT - 甲级 - 1090. Highest Price in Supply Chain (25)(树的遍历DFS)

Asupplychainisanetworkofretailers（零售商）,distributors（经销商）,andsuppliers（供应商）--everyoneinvolvedinmovingaproductfromsuppliertocustomer. Startingfromoneroo...

[综合] PAT - 甲级 - 1062. Talent and Virtue (25)(排序)

About900yearsago,aChinesephilosopherSimaGuangwroteahistorybookinwhichhetalkedaboutpeople'stalentandvirtue.Accordingtohistheory,amanbeingoutstandinginb...

[综合] PAT - 甲级 - 1091. Acute Stroke (30)(三维BFS)

Oneimportantfactortoidentifyacutestroke(急性脑卒中)isthevolumeofthestrokecore.GiventheresultsofimageanalysisinwhichthecoreregionsareidentifiedineachMRIslic...

[综合] PAT - 甲级 - 1074. Reversing Linked List (25)(链表)

GivenaconstantKandasinglylinkedlistL,youaresupposedtoreversethelinksofeveryKelementsonL.Forexample,givenLbeing1→2→3→4→5→6,ifK=3,thenyoumustoutput3→2→1...

[综合] JavaScript slice()和substring()的区别

Syntax:string.slice(start,stop); Syntax:string.sunstring(start,stop); 两者的相同点 如果start等于end，返回空字符串 如果stop参数省略，则取到字符串末 如果某个参数超过string的长度，这个参数会被替换为stri...

[综合] About bash_profile and bashrc on macOS

Note:bash_profileiscompletelydifferentfromconfigurationprofiles.LearnmoreaboutConfigurationProfilesinmybook:‘PropertyLists,PreferencesandProfilesforAp...