2018年3月21日
B. Fafa and the Gates
摘要： http://codeforces.com/problemset/problem/935/B Two neighboring kingdoms decided to build a wall between them with some gates to enable the citizens to 阅读全文
posted @ 2018-03-21 22:45 planche 阅读(249) 评论(0) 推荐(0) 编辑