2020 ICPC 济南 A Matrix Equation （高斯消元）
题目链接A-Matrix Equation 第 45 届国际大学生程序设计竞赛（ICPC）亚洲区域赛（济南） 题目描述We call a matrix "01 Square" if and only if it's a matrix and its elements are all or . For two 01 Squares ,, we define two operators and . The value of them are also 01 Square
