2016年2月19日
codeforces 630K Indivisibility （容斥原理）
摘要： IT City company developing computer games decided to upgrade its way to reward its employees. Now it looks the following way. After a ... 阅读全文
posted @ 2016-02-19 22:28 Herumw 阅读(179) 评论(0) 推荐(0) 编辑