Currency Exchange Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 19881 Accepted: 7114 Description Several currency exchange points are working in our city. Let us suppose that each point specializes in two particular currencies and pe…
Silver Cow Party Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 12674 Accepted: 5651 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 #X (1 ≤ X …
题目: A 国有 n 座城市,n−1 条双向道路将这些城市连接了起来,任何两个城市都可以通过道路互通. 某日,A 国爆发了丧尸危机,所有的幸存者现在都聚集到了 A 国的首都(首都是编号为 1 的城市).而其它城市的丧尸会时不时地向首都发起进攻. 为了抵御丧尸的攻击,幸存者在 A 国的每座城市都修建了防御工事.编号为 i 的城市,其防御工事强度为 di. 当一只丧尸决定进攻首都时,它会从某城市 u(u≠1) 沿经过道路数量最少的路径前往首都.沿途,这只丧尸会试图突破当地的防御工事. 对于某座防御工…
Description Several currency exchange points are working in our city. Let us suppose that each point specializes in two particular currencies and performs exchange operations only with these currencies. There can be several points specializing in the…
POJ 1860 Currency Exchange / ZOJ 1544 Currency Exchange (最短路径相关,spfa求环) Description Several currency exchange points are working in our city. Let us suppose that each point specializes in two particular currencies and performs exchange operations onl…
Several currency exchange points are working in our city. Let us suppose that each point specializes in two particular currencies and performs exchange operations only with these currencies. There can be several points specializing in the same pair o…