2019年3月6日
CodeForces - 455D
摘要： Serega loves fun. However, everyone has fun in the unique manner. Serega has fun by solving query problems. One day Fedor came up with such a problem. 阅读全文
posted @ 2019-03-06 16:54 mile-star 阅读(265) 评论(0) 推荐(0) 编辑