2017年11月20日
Codeforces Round #447 (Div. 2)
摘要： A. QAQ "QAQ" is a word to denote an expression of crying. Imagine "Q" as eyes with tears and "A" as a mouth. Now Diamond has given Bort a string consi 阅读全文
posted @ 2017-11-20 11:19 天之道，利而不害 阅读(231) 评论(0) 推荐(0) 编辑