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1783: [Usaco2010 Jan]Taking Turns Description Farmer John has invented a new way of feeding his cows. He lays out N (1 <= N <= 700,000) hay bales conv 阅读全文
摘要：
4506: [Usaco2016 Jan]Fort Moo Description Bessie is building a fort with her friend Elsie. Like any good fort, this one needs to start with a sturdy f 阅读全文