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Transposed matrix P27498

Statement

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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

Precondition

m is a square matrix n× n with n≥0.

Information