摘要: Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (a1, b1), (a2, b2), ..., (an, bn) which makes sum of 阅读全文
posted @ 2017-10-22 21:26 章鱼小年糕 阅读(124) 评论(0) 推荐(0) 编辑