2019-01-28发表2020-09-26更新OI矩阵http://www.matrix67.com/blog/archives/276 https://wenku.baidu.com/view/3a9d780feff9aef8941e06b6.html 矩阵https://gesrua.xyz/archives/数学/矩阵作者Gesrua发布于2019-01-28更新于2020-09-26许可协议#数学