摘要: E. Prairie Partition It can be shown that any positive integer x can be uniquely represented as x = 1 + 2 + 4 + ... + 2k - 1 + r, where k and r are in 阅读全文
posted @ 2017-05-08 20:07 meekyan 阅读(414) 评论(0) 推荐(0) 编辑