Given a x-by-x matrix filled with zeros (x is odd and > 3). Use 9s to draw a number 9 into it! Like this:
x = 5, y =
9 9 9 9 9
9 0 0 0 9
9 9 9 9 9
0 0 0 0 9
9 9 9 9 9
x = 7, y =
9 9 9 9 9 9 9
9 0 0 0 0 0 9
9 0 0 0 0 0 9
9 9 9 9 9 9 9
0 0 0 0 0 0 9
0 0 0 0 0 0 9
9 9 9 9 9 9 9
Solve

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Last Solution submitted on Feb 14, 2026

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泽伟 bao 灰 夕

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