摘要: Description There are n cities in Byteland, labeled by 1 to n. The... 阅读全文
posted @ 2021-08-04 23:44 PushyTao 阅读(27) 评论(0) 推荐(0) 编辑
摘要: Let’s call the string beautiful if it does not contain a substring... 阅读全文
posted @ 2021-08-04 23:22 PushyTao 阅读(38) 评论(0) 推荐(0) 编辑