2015年1月8日
(简单) HDU 3397 Sequence operation，线段树+区间合并。
摘要： Problem Description lxhgww got a sequence contains n characters which are all '0's or '1's. We have five operations here: Change operations: 0 a... 阅读全文
posted @ 2015-01-08 13:25 WhyWhy。 阅读(274) 评论(0) 推荐(0)