DescriptionBessiehasmovedtoasmallfarmandsometimesenjoysreturningtovisitoneofherbestfriends.Shedoesnotwanttogettoheroldhometooquickly,becauseshelikesthesceneryalongtheway.Shehasdecidedtotakethesecond-shortestratherthantheshortestpath.Sheknowstheremustbesomesecond-shortestpath.Thecountrysideconsistsof R (1≤ R ≤100,000)bidirectionalroads,eachlinkingtwooftheN(1≤ N ≤5000)intersectio...
题目描述DescriptionWelcometotheHungaryGames!ThestreetsofBudapestformatwistednetworkofone-waystreets.欢迎来到匈牙利游戏!布达佩斯(匈牙利首都)的街道形成了一个弯曲的单向网络。Youhavebeenforcedtojoinaraceaspartofa“RealityTV”showwhereyouracethroughthesestreets,startingattheSz´echenyithermalbath(sforshort)andendingattheTombofG¨ulBaba(tforshort).你被强制要求参加一个赛跑作为一个TV秀的...
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