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• 「BZOJ1033」[ZJOI2008] 杀蚂蚁antbuster

  

  Description最近，佳佳迷上了一款好玩的小游戏：antbuster。游戏规则非常简单：在一张地图上，左上角是蚂蚁窝，右下角是蛋糕，蚂蚁会源源不断地从窝里爬出来，试图把蛋糕搬回蚂蚁窝。而你的任务，就是用原始资金以及杀蚂蚁获得的奖金造防御塔，杀掉这些试图跟你抢蛋糕的蚂蚁~下附一张游戏截图： 为了拿到尽可能高的分数，佳佳设计了很多种造塔的方案，但在尝试了其中的一小部分后，佳佳发现，这个游戏实在是太费时间了。为了节省...
  32014年4月21日8,559模拟

• 「CF413B」Spyke Chatting

  

  TheR2companyhas n employeesworkingforit.Theworkinvolvesconstantexchangeofideas,sharingthestoriesofsuccessandupcomingchallenging.Forthat,R2usesafamousinstantmessagingprogramSpyke.R2has m Spykechatsjusttodiscussallsortsofissues.Ineachchat,somegroupofemployeesexchangesmessagesdaily.Anemployeecansimultaneouslytalkinmultiplechats.Ifsomeemployeeisinthe k-thchat,hecanwritemessagestothisch...
  02014年4月20日3,533模拟

• 「CF413A」Data Recovery

  

  NotsolongagocompanyR2boughtcompanyR1andconsequently,allitsdevelopmentsinthefieldofmulticoreprocessors.NowtheR2laboratoryistestingoneoftheR1processors.Thetestinggoesin n steps,ateachsteptheprocessorgetssomeinstructions,andthenitstemperatureismeasured.TheheadengineerinR2iskeepingareportrecordontheworkoftheprocessor:hewritesdowntheminimumandthemaximummeasuredtemperatureinhisnotebook.Hisas...
  02014年4月20日2,664模拟

• 「CF412E」E – mail Addresses

  

  OneofthemostimportantproductsoftheR1companyisapopular@r1.commailservice.TheR1mailboxesreceiveandsendmillionsofemailseveryday.Today,theonlinenewsthunderedwithterribleinformation.TheR1databasecrashedandalmostnodatacouldbesavedexceptforonebigstring.ThedevelopersassumethatthestringcontainsthelettersofsomeusersoftheR1mail.Recoveringlettersisatediousmostlymanualwork.Sobeforeyoustartthisproces...
  02014年4月19日3,000模拟

• 「CF412C」Pattern

  

  Developersoftenfacewithregularexpressionpatterns.Apatternisusuallydefinedasastringconsistingofcharactersandmetacharactersthatsetstherulesforyoursearch.Thesepatternsaremostoftenusedtocheckwhetheraparticularstringmeetsthecertainrules.Inthistask,apatternwillbeastringconsistingofsmallEnglishlettersandquestionmarks('?').Thequestionmarkinthepatternisametacharacterthatdenotesanarbitrarysmalllettero...
  02014年4月19日2,328模拟

• 「CF412B」Network Configuration

  

  TheR1companywantstoholdawebsearchchampionship.Therewere n computersgivenforthecompetition,eachofthemisconnectedtotheInternet.Theorganizersbelievethatthedatatransferspeeddirectlyaffectstheresult.ThehigherthespeedoftheInternetis,thefastertheparticipantwillfindthenecessaryinformation.Therefore,beforethecompetitionstarted,eachcomputerhaditsmaximumpossibledatatransferspeedmeasured.Onthe i-t...
  02014年4月19日2,555模拟

• 「CF412A」Poster

  

  TheR1companyhasrecentlyboughtahighrisebuildinginthecentreofMoscowforitsmainoffice.It'stimetodecoratethenewoffice,andthefirstthingtodoistowritethecompany'ssloganabovethemainentrancetothebuilding.Thesloganofthecompanyconsistsof n characters,sothedecoratorshungalargebanner, n meterswideand 1 meterhigh,dividedinto n equalsquares.Thefirstcharacterofthesloganmustbeinthefirstsquare(theleftm...
  02014年4月19日2,463模拟

• 「CF417C」Football

  

  Oneday,atthe"RussianCodeCup"eventitwasdecidedtoplayfootballasanoutofcompetitionevent.Allparticipantswasdividedinto n teamsandplayedseveralmatches,twoteamscouldnotplayagainsteachothermorethanonce.TheappointedJudgewasthemostexperiencedmember—Pavel.Butsincehewasthewisestofall,hesoongotboredofthegameandfellasleep.Wakingup,hediscoveredthatthetournamentisoverandtheteamswanttoknowtheresultso...
  02014年4月19日2,493模拟

• 「CF417B」Crash

  

  Duringthe"RussianCodeCup"programmingcompetition,thetestingsystemstoresallsentsolutionsforeachparticipant.Weknowthatmanyparticipantsuserandomnumbersintheirprogramsandareoftensentseveralsolutionswiththesamesourcecodetocheck.Eachparticipantisidentifiedbysomeuniquepositiveinteger k,andeachsentsolution A ischaracterizedbytwonumbers: x —thenumberofdifferentsolutionsthataresentbeforethefirst...
  02014年4月19日2,180模拟

• 「BZOJ1621」[Usaco2008 Open] Roads Around The Farm分岔路口

  

  Description    约翰的N(1≤N≤1,000,000,000)只奶牛要出发去探索牧场四周的土地．她们将沿着一条路走，一直走到三岔路口（可以认为所有的路口都是这样的）．这时候，这一群奶牛可能会分成两群，分别沿着接下来的两条路继续走．如果她们再次走到三岔路口，那么仍有可能继续分裂成两群继续走．    奶牛的分裂方式十分古怪：如果这一群奶牛可以精确地分成两部分，这两部分的牛数恰好相差K(1≤K≤1000)，那么在三岔路口牛...
  02014年4月15日2,515模拟

• 「CF415A」Mashmokh and Lights

  

  Mashmokhworksinafactory.Attheendofeachdayhemustturnoffallofthelights.Thelightsonthefactoryareindexedfrom 1 to n.Thereare n buttonsinMashmokh'sroomindexedfrom 1 to n aswell.IfMashmokhpushesbuttonwithindex i,theneachlightwithindexnotlessthani thatisstillturnedonturnsoff.Mashmokhisnotveryclever.Soinsteadofpushingthefirstbuttonhepushessomeofthebuttonsrandomlyeachnight.Hepushed m ...
  02014年4月7日2,261模拟

• 「BZOJ1620」[Usaco2008 Nov] Time Management 时间管理

  

  DescriptionEverthematuringbusinessman,FarmerJohnrealizesthathemustmanagehistimeeffectively.HehasNjobsconvenientlynumbered1..N(1<=N<=1,000)toaccomplish(likemilkingthecows,cleaningthebarn,mendingthefences,andsoon).Tomanagehistimeeffectively,hehascreatedalistofthejobsthatmustbefinished.JobirequiresacertainamountoftimeT_i(1<=T_i<=1,000)tocompleteandfurthermoremustbefinishedbyti...
  02014年4月5日3,205模拟