摘要: A - Integer Sequence Dividing 签到,思维拓展 You are given an integer sequence 1,2,…,n1,2,…,n. You have to divide it into two sets AAand BB in such a way tha 阅读全文
posted @ 2019-01-11 09:46 maybe96 阅读(266) 评论(0) 推荐(1) 编辑