Draw a x-by-x matrix 'H' using 1 and 0. (x is odd and bigger than 2)
Example:
x=5 ans= [1 0 0 0 1 1 0 0 0 1 1 1 1 1 1 1 0 0 0 1 1 0 0 0 1] x=7 ans= [1 0 0 0 0 0 1 1 0 0 0 0 0 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 0 0 0 0 0 1 1 0 0 0 0 0 1]
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