Tarjan BZOJ1589: [Usaco2008 Dec]Trick or Treat on the Farm 采集糖果 Time Limit: 5 Sec Memory Limit: 64 MB Description 每年万圣节，威斯康星的奶牛们都要打扮一番，出门在农场的N(1≤N≤100000)个牛棚里转悠，来采集糖果．她们每走到一… 2017-08-09 0 Comments 1,619 Views 0 Times 阅读全文