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题目链接： https://cn.vjudge.net/problem/POJ-3037 Bessie and the rest of Farmer John's cows are taking a trip this winter to go skiing. One day Bessie find 阅读全文
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题目链接： https://cn.vjudge.net/problem/POJ-1724 N cities named with numbers 1 ... N are connected with one-way roads. Each road has two parameters associ 阅读全文
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题目链接： https://cn.vjudge.net/problem/POJ-1860 Several currency exchange points are working in our city. Let us suppose that each point specializes in t 阅读全文