Module Matrix multiplication

Matrix multiplication

**Frequency: 1.5/10** Matrix multiplication is _mostly_ used in competitive programming to solve DP problems with unreasonably high constraints.

Resources

- [USACO: Matrix Exponentiation](https://usaco.guide/plat/matrix-expo?lang=cpp)

Problems

Fibonacci 2 81 / 84 1500
Martian language 2 26 / 26 1500
Hakurei Shrine 2 17 / 28 1600
Number sequence 18 / 20 1700
Chess 6 / 12 1800