Convert the input to a cell array, but only if necessary.
If the input is a numeric array, return a 1-by-1 cell array containing the input. If the input is a cell array of numeric arrays, return the input unaltered.
Back and Forth Rows
Distance walked 1D
Back to basics 22 - Rotate a matrix
letter yes yes & letter no no
Multiply 2 numbers
Numeric array to cell array of strings (easy)
Detect circles in images
Pentago: find winning move
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