Draw a x-by-x matrix 'B' using 1 and 0. (x is odd and bigger than 4)

Example:

x=5
ans=
[1 1 1 1 0
 1 0 0 0 1
 1 1 1 1 0
 1 0 0 0 1
 1 1 1 1 0]
x=7
ans=
[1 1 1 1 1 1 0
 1 0 0 0 0 0 1
 1 0 0 0 0 0 1
 1 1 1 1 1 1 0 
 1 0 0 0 0 0 1
 1 0 0 0 0 0 1
 1 1 1 1 1 1 0]
Solve

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Last Solution submitted on Aug 28, 2026

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Olivier Walos Khiem Georgios Prabal

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