Ciyeblog - gcd(x,y)=1，l<=x,y<=r，求x,y使得|x-y|最大 的评论 https://www.ciyekua.cn/index.php/diary/160.html zh-CN ​ 相关题目：[Problem - D - Codeforces](https://codeforces.com/contest/2043/problem/D "Problem - D - Co... Thu, 01 Jan 1970 08:00:00 +0800 Thu, 01 Jan 1970 08:00:00 +0800