Products of matrices P88905

Statement

thehtml

Write a function that, given two matrices @a@ and @b@, computes their product.

Interface

C++	typedef vector< vector<int> > Matrix; Matrix product(const Matrix& a, const Matrix& b);
MyPy	Matrix: TypeAlias = list[list[int]] def product(a: Matrix, b: Matrix) -> Matrix

Precondition

@a@ is a matrix p× q and @b@ is a matrix q× r, with p,q,r≥1.

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