随笔分类 -  规律

摘要:Problem DescriptionAs we know, Rikka is poor at math. Yuta is worrying about this situation, so he asks rikka to have some practice on codeforces. The... 阅读全文
posted @ 2015-07-31 16:01 HGF 阅读(189) 评论(0) 推荐(0)