2017年3月20日
[USACO09JAN]全流Total Flow
摘要： 题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the 阅读全文
posted @ 2017-03-20 21:47 J_william 阅读(415) 评论(0) 推荐(0) 编辑