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]
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Last Solution submitted on Mar 05, 2026

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Pauli Huusari 梓斌 Katya Lorenzo

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