2017年12月29日
逆序数 技巧题
摘要： A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is 阅读全文
posted @ 2017-12-29 12:23 楼主好菜啊 阅读(500) 评论(0) 推荐(0)