you should concatenate the elements of a matrix in one dimensional array, for example if the input is
A = [1 2 3; 4 5 6; 7 8 9];
the output will be like this:
B = [1 2 3 4 5 6 7 8 9];
Times 2 - START HERE
Most nonzero elements in row
Create matrix of replicated elements
first element of matrix
No more zeros
determine the sum of the squares
sum all digits
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