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]
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Last Solution submitted on Sep 02, 2026

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George Berken Christian Schröder Noora Al Suwaidi HCT2022 Snahal Kumar

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