摘要： Drainage Ditches Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 69355 Accepted: 26873 Description Every time it rains on Farmer John's fie 阅读全文

摘要： 题目链接：http://poj.org/problem?id=1459 Power Network Time Limit: 2000MS Memory Limit: 32768K Total Submissions: 27074 Accepted: 14066 Description A power 阅读全文