2018年7月15日
F - Set of Strings
摘要： You are given a string q. A sequence of k strings s1, s2, ..., sk is called beautiful, if the concatenation of these strings is strin... 阅读全文
posted @ 2018-07-15 15:11 Let_Life_Stop 阅读(261) 评论(0) 推荐(0) 编辑