2017年10月26日
【洛谷 1948】电话线
摘要： 题目描述 Farmer John wants to set up a telephone line at his farm. Unfortunately, the phone company is uncooperative, so he needs to pay for some of the c 阅读全文
posted @ 2017-10-26 20:43 Le_Mon 阅读(227) 评论(0) 推荐(2) 编辑