#USACO08DEC

P2921 [USACO08DEC]在农场万圣节Trick or Treat on the Farm

EveryyearinWisconsinthecowscelebratetheUSAautumnholidayofHalloweenbydressingupincostumesandcollectingcandythatFarmerJohnleavesintheN(1<=N<=100,000)stallsc...