Draw '+' in an x-by-x matrix (where x is odd and x >3)
Example:
x = 5
y = [0 0 1 0 0
0 0 1 0 0
1 1 1 1 1
0 0 1 0 0
0 0 1 0 0]
Solve

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Last Solution submitted on Feb 06, 2026

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Slawek Matthew Bolyard 子俊 明泉

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