「Edu Codeforces Round」#131 (Div.2)

CF1271D Portals 题解

二分图匹配简单题 题解

CF1349A Orac and LCM 题解

「Codeforces Round」#804 (Div. 2)

CF359B Permutation 题解

luogu4852 yyf hates choukapai 题解

CF1338B Edge Weight Assignment 题解

CF1416B Make Them Equal 题解

CF1542B Plus and Multiply 题解