Transposed matrix P27498

Statement

Write a procedure that transposes a square matrix @m@.

Interface

C++	`typedef vector< vector<int> > Matrix;`
	`void transpose(Matrix& m);`
Java	`public static void transpose(int[][] m);`
Python	`transpose(m) # returns None`
MyPy	`transpose(m: list[list[int]]) -> None`

@m@ is a square matrix $n\times n$ with $n\ge0$ .

Information