2015年4月28日
数论神题——进击的羊角兽
摘要： 数论神题 进击的羊角兽 题目描述： 求满足 $a+b|ab(a,b \leq n,a \neq b)$的有序数对$(a,b)$的个数。 solution 设$(a,b)=d , (a include include include include include include include in 阅读全文
posted @ 2015-04-28 21:17 GerynOhenz 阅读(468) 评论(0) 推荐(0) 编辑