Problem 1853. Enlarge array

A = [1 2 3
     4 5 6
     7 8 9]
sz = [3 2]

B = [1 1 2 2 3 3
     1 1 2 2 3 3
     1 1 2 2 3 3
     4 4 5 5 6 6
     4 4 5 5 6 6
     4 4 5 5 6 6
     7 7 8 8 9 9
     7 7 8 8 9 9
     7 7 8 8 9 9]

Solution Comments

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