2017年3月1日
（线段树）hdoj 3397-Sequence operation
摘要： lxhgww got a sequence contains n characters which are all '0's or '1's. We have five operations here: Change operations: 0 a b change all characters i 阅读全文
posted @ 2017-03-01 19:30 perplex 阅读(132) 评论(0) 推荐(0)