2017年9月5日
Codeforces Round #432 (Div. 2) ABC
摘要： A. Arpa and a research in Mexican wave A. Arpa and a research in Mexican wave Arpa is researching the Mexican wave. There are n spectators in the stad 阅读全文
posted @ 2017-09-05 09:14 starry_sky 阅读(226) 评论(0) 推荐(0)