原题链接:http://poj.org/problem?id=1860 Currency Exchange Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 23055   Accepted: 8328 Description Several currency exchange points are working in our city. Let us suppose that each point specializes…

Currency Exchange Time Limit:1000MS     Memory Limit:30000KB     64bit IO Format:%I64d & %I64u Submit Status Practice POJ 1860 Appoint description:  System Crawler  (2015-05-14) Description Several currency exchange points are working in our city. Le…

感觉最短路好神奇呀,刚开始我都 没想到用最短路 题目: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 题解:这题其实是用bellman_ford的思想,通过n-1次松弛后,如果还能增加,就说明有环 可以使金钱数不断增加. #include <iostream> #include<cstdio>…

http://poj.org/problem?id=1860 #include <cstdio> //#include <queue> //#include <deque> #include <cstring> using namespace std; #define MAXM 202 #define MAXN 101 int n,m; int first[MAXN]; int next[MAXM]; int pto[MAXM]; double earn[M…

题目链接. 分析: 以前没做出来,今天看了一遍题竟然直接A了.出乎意料. 大意是这样,给定不同的金币的编号,以及他们之间的汇率.手续费,求有没有可能通过不断转换而盈利. 直接用Bellman-ford检测负环的方法检测. #include <iostream> #include <cstdio> #include <cstring> using namespace std; ; <<); struct Node { int u, v; double r, c…

题目传送门 /* 最短路(Bellman_Ford):求负环的思路,但是反过来用,即找正环 详细解释:http://blog.csdn.net/lyy289065406/article/details/6645778 */ #include <cstdio> #include <iostream> #include <algorithm> #include <cstring> #include <vector> #include <cmat…

Currency Exchange Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 60000/30000K (Java/Other) Total Submission(s) : 4   Accepted Submission(s) : 2 Problem Description Several currency exchange points are working in our city. Let us suppose that…

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…

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…

链接: http://poj.org/problem?id=1860 Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 23261   Accepted: 8419 Description Several currency exchange points are working in our city. Let us suppose that each point specializes in two particular…