Given a matrix, sort it for each column, but cannot change the element of each row.
input = [1 3; 2 4;1 5;3 6];
the result returned by you is
target = [1 3; 1 5;2 4; 3 6];
The problem statement should say what is and is not allowed for the solution, particularly if you're going to invalidate previously valid solutions.
Agree with Guillaume.
Only works for integer numbers.
I find it ironical that you disallow unique in the test suite, yet your own solution is just a roundabout way of calling unique
two guys, calm down, I also raise it by other people's solution
copy from Peng Liu, delete comments
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