Anyalovestowatchhorrormovies.Inthebesttraditionsofhorror,shewillbevisitedbymghoststonight.Anyahaslotsofcandlespreparedforthevisits,eachcandlecanproducelightforexactlytseconds.Ittakesthegirlonesecondtolightonecandle.Moreformally,Anyacanspendonesecondtolightonecandle,thenthiscandleburnsforexactlytsecondsandthengoesoutandcannolongerbeused.ForeachofthemghostsAnyaknowsthetimeatwhichitcomes:thei...
Pashaloveshisphoneandalsoputtinghishairup...Butthehairisnowirrelevant.Pashahasinstalledanewgametohisphone.Thegoalofthegameisfollowing.Thereisarectangularfieldconsistingofnrowwithmpixelsineachrow.Initially,allthepixelsarecoloredwhite.Inonemove,Pashacanchooseanypixelandcoloritblack.Inparticular,hecanchoosethepixelthatisalreadyblack,thenaftertheboy'smovethepixeldoesnotchange,thatis,itremains...
Noticethatthememorylimitisnon-standard.RecentlyArthurandSashahavestudiedcorrectbracketsequences.Arthurunderstoodthistopicperfectlyandbecomesoamazedaboutcorrectbracketsequences,soheevengothimselfafavoritecorrectbracketsequenceoflength2n.UnlikeArthur,Sashaunderstoodthetopicverybadly,andbrokeArthur'sfavoritecorrectbracketsequencejusttospitehim.AllArthurremembersabouthisfavoritesequenceisfo...
DescriptionBessie,FarmerJohn'sprizecow,hasjustwonfirstplaceinabovinebeautycontest,earningthetitle'MissCowWorld'.Asaresult,BessiewillmakeatourofN(2<=N<=50,000)farmsaroundtheworldinordertospreadgoodwillbetweenfarmersandtheircows.Forsimplicity,theworldwillberepresentedasatwo-dimensionalplane,whereeachfarmislocatedatapairofintegercoordinates(x,y),eachhavingavalueintherange-10,000...1...
Youhavematrixaofsizen × n.Let'snumbertherowsofthematrixfrom1tonfromtoptobottom,let'snumberthecolumnsfrom1tonfromlefttoright.Let'suseaijtorepresenttheelementontheintersectionofthei-throwandthej-thcolumn.Matrixameetsthefollowingtwoconditions:foranynumbersi, j(1 ≤ i, j ≤ n)thefollowinginequalityholds:aij ≥ 0;.Matrixbisstrictlypositive,ifforanynumbersi, j(1 ≤ i, j ≤ n)theine...
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