2019年9月25日
Codeforces Round #426 (Div. 2) B题【差分数组搞一搞】
摘要： B. The Festive Evening It's the end of July – the time when a festive evening is held at Jelly Castle! Guests from all over the kingdom gather here to 阅读全文
posted @ 2019-09-25 20:16 pengge666 阅读(159) 评论(0) 推荐(0)