摘要：
Silver Cow PartyTime Limit:2000MSMemory Limit:65536KTotal Submissions:9514Accepted:4263DescriptionOne cow from each ofNfarms (1 ≤N≤ 1000) conveniently numbered 1..Nis going to attend the big cow party to be held at farm #X(1 ≤X≤N). A total ofM(1 ≤M≤ 100,000) unidirectional (one-way roads connects pa 阅读全文
摘要：
ArbitrageTime Limit:1000MSMemory Limit:65536KTotal Submissions:11886Accepted:5000DescriptionArbitrage is the use of discrepancies in currency exchange rates to transform one unit of a currency into more than one unit of the same currency. For example, suppose that 1 US Dollar buys 0.5 British pound, 阅读全文