Create a reverse checkbox matrix with '69'. Where the size is the input and output will be a square checkbox matrix.
Example
If input is 4 then output will be
[ 0 69 0 69
69 0 69 0
0 69 0 69
69 0 69 0]
155 Solvers
868 Solvers
Vectorizing, too easy or too hard?
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Output any real number that is neither positive nor negative
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Count decimal digits of a number
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