2017年11月7日
CodeForces - 242E XOR on Segment
摘要： You've got an array a, consisting of n integers a1, a2, ..., an. You are allowed to perform two operations on this array: Expression means applying bi 阅读全文
posted @ 2017-11-07 21:59 晓风微微 阅读(318) 评论(0) 推荐(0) 编辑