I think "m*n" & "1*s" (or "m×n" & "1×s") may be clearer. I read "mXn" & "1Xs" firstly as variable names.
Return unique values without sorting
We love vectorized solutions. Problem 1 : remove the row average.
Given a 4x4 matrix, swap the two middle columns
Find a Pythagorean triple
Remove the air bubbles from a vector
Sum of Two Numbers
Horizontal matrix sort
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