【USACO2021 Closest Cow Wins 】題解
題目 Farmer John owns a long farm along the highway that can be considered somewhat like a one-dimens ...
原文：【USACO2021 Connecting Two Barns 】題解
題目 Farmer John s farm consists of a set of N fields leq N leq , conveniently numbered ldots N . Between these fields are M bi directed paths leq M leq , each connecting a pair of fields. The farm cont ...
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