
PrincessTwilightwenttoCelestiaandLuna'soldcastletoresearchthechestfromtheElementsofHarmony.Asequenceofpositiveintegers bi isharmonyifandonlyifforeverytwoelementsofthesequencetheirgreatestcommondivisorequals1.Accordingtoanancientbook,thekeyofthechestisaharmonysequence bi whichminimizesthefollowingexpression:Youaregivensequence ai,helpPrincessTwilighttofindthekey.InputThefirstlinec...
![「BZOJ1688」[Usaco2005 Open] Disease Manangement 疾病管理](http://hzwer.com/wp-content/themes/ly/image/image_post/2014-12-10_12-29-17.jpg)
DescriptionAlas!AsetofD(1<=D<=15)diseases(numbered1..D)isrunningthroughthefarm.FarmerJohnwouldliketomilkasmanyofhisN(1<=N<=1,000)cowsaspossible.IfthemilkedcowscarrymorethanK(1<=K<=D)differentdiseasesamongthem,thenthemilkwillbetoocontaminatedandwillhavetobediscardedinitsentirety.PleasehelpdeterminethelargestnumberofcowsFJcanmilkwithouthavingtodiscardthemilk.Input...

AboynamedGenareallywantstogettothe"RussianCodeCup"finals,oratleastgetat-shirt.Buttheofferedproblemsaretoocomplex,sohemadeanarrangementwithhis n friendsthattheywillsolvetheproblemsforhim.Theparticipantsareoffered m problemsonthecontest.Foreachfriend,Genaknowswhatproblemshecansolve.ButGena'sfriendswon'tagreetohelpGenafornothing:the i-thfriendasksGena xi rublesforhishelp insolvin...
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