2018年2月23日
Luogu P2826 [USACO08NOV]光开关Light Switching
摘要： 题目描述 Farmer John tries to keep the cows sharp by letting them play with intellectual toys. One of the larger toys is the lights in the barn. Each of t 阅读全文
posted @ 2018-02-23 20:21 sinEagle 阅读(157) 评论(0) 推荐(0) 编辑