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1657: [Usaco2006 Mar]Mooo 奶牛的歌声 Description Farmer John's N (1 <= N <= 50,000) cows are standing in a very straight row and mooing. Each cow has a uni 阅读全文
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1636: [Usaco2007 Jan]Balanced Lineup Description For the daily milking, Farmer John's N cows (1 <= N <= 50,000) always line up in the same order. One 阅读全文
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1621: [Usaco2008 Open]Roads Around The Farm分岔路口 Description 约翰的N(1≤N≤1,000,000,000)只奶牛要出发去探索牧场四周的土地.她们将沿着一条路走,一直走到三岔路口(可以认为所有的路口都是这样的).这时候,这一群奶牛可能会分成两 阅读全文