摘要: Educational Codeforces Round 106 (Rated for Div. 2) D. The Number of Pairs 题意 给定三个正整数$c,d,x$,询问有多少对正整数对$(a,b)$,满足 \[ c \cdot lcm - d \cdot gcd = x \] 阅读全文
posted @ 2021-03-19 00:57 StelaYuri 阅读(154) 评论(0) 推荐(0) 编辑