题目链接:http://poj.org/problem?id=1860 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 b…

题目连接:http://poj.org/problem?id=1860 题意:有多种从a到b的汇率,在你汇钱的过程中还需要支付手续费,那么你所得的钱是 money=(nowmoney-手续费)*rate,现在问你有v钱,从s开始出发交换钱能不能赚钱. 分析:如何存在正环,能无限增加钱,肯定可以赚了,因此用spfa判一下即可 #include <cstdio> #include <cstring> #include <string> #include <cmath&…

题目链接: https://vjudge.net/problem/POJ-1860 题目大意: 我们的城市有几个货币兑换点.让我们假设每一个点都只能兑换专门的两种货币.可以有几个点,专门从事相同货币兑换.每个点都有自己的汇率,外汇汇率的A到B是B的数量你1A.同时各交换点有一些佣金,你要为你的交换操作的总和.在来源货币中总是收取佣金. 例如,如果你想换100美元到俄罗斯卢布兑换点,那里的汇率是29.75,而佣金是0.39,你会得到(100 - 0.39)×29.75＝2963.3975卢布. 你…

Currency Exchange Time Limit:1000MS     Memory Limit:30000KB     64bit IO Format:%I64d & %I64u Submit Status Practice POJ 1860 Description Several currency exchange points are working in our city. Let us suppose that each point specializes in two par…

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…

题目链接:http://poj.org/problem?id=1860 Currency Exchange Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 32128   Accepted: 12228 Description Several currency exchange points are working in our city. Let us suppose that each point specialize…

题意:有m个货币交换点,每个点只能有两种货币的互相交换,且要给佣金,给定一开始的货币类型和货币数量,问若干次交换后能否让钱增加. 思路:spfa求最长路,判断是否存在正环,如果存在则钱可以在环中一直增加,最后的钱肯定也是增加的. #include <iostream> #include <cstring> #include <queue> #include <cstdio> using namespace std; + ; struct edge{ int…

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…

Arbitrage Time Limit: 1000MS   Memory Limit: 65536K Total Submissions:27167   Accepted: 11440 Description 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 currenc…

Currency Exchange DescriptionSeveral 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 sp…