Please! Can you explain more than that?
Aye! The first column is not "sorted according the second column" (only half an explanation). The block of numbers in each row is treated as a fixed unit, and each row is rearranged such that the values in the second column are sorted in ascending order.
Project Euler: Problem 8, Find largest product in a large string of numbers
Sum of diagonal of a square matrix
Is the input divisible by 3?
Length of a short side
function on a moving window
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