摘要：
Description Background Hugo Heavy is happy. After the breakdown of the Cargolifter project he can now expand business. But he needs a clever ma... 阅读全文
摘要：
Description One cow from each of N farms (1 ≤ N ≤ 1000) conveniently numbered 1..N is going to attend the big cow party to be held at farm ... 阅读全文
摘要：
Description Several currency exchange points are working in our city. Let us suppose that each point specializes in two particular currencie... 阅读全文