摘要： 题目链接：http://poj.org/problem?id=3281Cows are such finicky eaters. Each cow has a preference for certain foods and drinks, and she will consume no other... 阅读全文

摘要： 题目链接：http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=1760Given a weighted directed graph, we define the shortest path as the path who has t... 阅读全文