Arbitrage

最新推荐文章于 2022-06-02 00:24:51 发布

gao_ben_15

最新推荐文章于 2022-06-02 00:24:51 发布

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分类专栏： POJ 文章标签： acm

本文链接：https://blog.youkuaiyun.com/gao_ben_15/article/details/77897610

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该博客介绍了套利的概念，即利用货币汇率的差异来获取利润。通过给出的例子，解释了如何通过转换不同货币实现利润，并提供了一个程序，用于判断在给定的汇率列表中是否存在套利机会。输入包括不同货币的数量、汇率表，输出则根据是否存在套利可能返回'是'或'否'。示例展示了两个测试用例，其中一个存在套利机会，另一个则没有。

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描述

Arbitrage 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, 1 British pound buys 10.0 French francs, and 1 French franc buys 0.21 US dollar. Then, by converting currencies, a clever trader can start with 1 US dollar and buy 0.5 * 10.0 * 0.21 = 1.05 US dollars, making a profit of 5 percent.
Your job is to write a program that takes a list of currency exchange rates as input and then determines whether arbitrage is possible or not.

输入

The input file will contain one or more test cases. Om the first line of each test case there is an integer n (1<=n<=30), representing the number of different currencies. The next n lines each contain the name of one currency. Within a name no spaces will appear. The next line contains one integer m, representing the length of the table

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