摘要: 2016暑假多校联合 Rikka with Sequence (线段树) Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka s 阅读全文
posted @ 2016-08-12 17:41 茶飘香~ 阅读(283) 评论(0) 推荐(0) 编辑