1 Template
1.1 轻量化
灵活度较高,适合直接调用矩阵内值的情形。
typedef vector<vector<int>> Matrix;
void resize (Matrix& a, int n, int m) {
a.resize(n, vector<int>(m));
}
Matrix operator * (const Matrix &a, const Matrix &b) {
Matrix res; resize(res, a.size(), b[0].size());
for (int i = 0; i < a.size(); i++)
for (int j = 0; j < b[0].size(); j++)
for (int k = 0; k < a[0].size();k++)
(res[i][j] += 1ll*a[i][k] * b[k][j]%mod) %= mod;
return res;
}
1.2 封装
作为一个整体,适合和其她东西一起用(eg. 线段树。
下面是 min+ 矩乘(截自
1.
标签:Matrix,int,res,矩阵,笔记,++,resize,size
From: https://www.cnblogs.com/CloudWings/p/18344753