摘要: A sequence a1,a2,…,ana1,a2,…,an is called good if, for each element aiai, there exists an element ajaj (i≠ji≠j) such that ai+ajai+aj is a power of two 阅读全文
posted @ 2018-08-01 17:24 王陸 阅读(540) 评论(0) 推荐(0) 编辑