1008 - Expectation of Rank
题目大意
一个 n ∗ n n*n n∗n 的矩阵在 m o d p mod\space p mod p 意义下随机生成,问矩阵的秩的期望为多少
解题思路
某一行要对秩产生贡献,那肯定与之前所有行之间都不存在线性相关
由此考虑dp, f i ,…
Problem DescriptionWhen ?? was born, seven crows flew in and stopped beside him. In its childhood, ?? had been unfortunately fall into the sea. While it was dying, seven dolphins arched its body and sent it back to the shore. It is said that ?? used …