this problem is similar with Problem 1630. ~~~~~~~ WAVE ~~~~~~~~~
Apologies! Didn't see this problem until just recently.
not necessarily optimal but a valiant attempt
Chintan just got sick wit'it
Back to basics 14 - Keywords
Find nearest prime number less than input number
Change the sign of even index entries of the reversed vector
Given a 4x4 matrix, swap the two middle columns
Dimensions of a rectangle
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