2018年10月6日
HDU - 4821 String（窗口移动+map去重+hash优化）
摘要： String Given a string S and two integers L and M, we consider a substring of S as “recoverable” if and only if (i) It is of length M*L; (ii) It can be 阅读全文
posted @ 2018-10-06 21:06 yzm10 阅读(355) 评论(0) 推荐(0) 编辑