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Problem 44401. Vertical matrix sort

Given a matrix x with n rows and m columns, return a matrix y with 2n rows and m columns, such that every column in x is sorted from low to high and then from high to low.

Example:

x = 8  9  3  9
    9  6  5  2
    2  1  9  9

y = 2  1  3  2
    8  6  5  9
    9  9  9  9
    9  9  9  9
    8  6  5  9
    2  1  3  2
Solve

Solution Stats

21.51% Correct | 78.49% Incorrect
Last Solution submitted on Oct 11, 2023

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