2017年2月26日
Codeforces 748B Santa Claus and Keyboard Check
摘要： Santa Claus decided to disassemble his keyboard to clean it. After he returned all the keys back, he suddenly realized that some pairs of keys took ea 阅读全文
posted @ 2017-02-26 22:37 萧萧Hsiao 阅读(518) 评论(0) 推荐(0) 编辑