It needs more than one test
agree! it is easy to cheat!
The only valid excuse for cheating is when the test suite is broken since we cannot fix it. Kobayashi Maru.
Flip the main diagonal of a matrix
Check if number exists in vector
Given area find sides
A quadrant matrix
Find the elements of a matrix according to a defined property.
First non-zero element in each column
Create a matrix X, where each column is a shifted copy of the vector v
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