摘要: 题目 You are given a positive integer $N(1≦N≦10^{18})$. Find the number of the pairs of integers $u$ and $v (0≦u,v≦N)$ such that there exist two non-neg 阅读全文
posted @ 2020-05-09 21:45 YouXam 阅读(287) 评论(0) 推荐(0) 编辑