Problem 44101. Adaptive ZigZag

Difficulty:Rate

Unfold a 2-D matrix to a 1-D array in Adaptive zig-zag order, e.g., for matrix

 [ 1 2 5 6;
   3 4 7 8;
   9 10 13 14;
   11 12 15 16]

the resulting 1-D array should be

 [ 1 5 9 13 2 3 4 6 7 8 10 11 12 14 15 16]

Solve

Last Solution submitted on Apr 01, 2023

yurenchu on 25 Apr 2017

Sorry, the logic of what the problem suggests is not very clear to me. Should the input 2D matrix be broken up in 2-by-2 matrices first, and why?

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