Given a x-by-x matrix filled with zeros (x is odd and > 3). Use 4s to draw a number 4 into it! Like this:
x = 5, y =
4 0 0 0 4
4 0 0 0 4
4 4 4 4 4
0 0 0 0 4
0 0 0 0 4
x = 7, y =
4 0 0 0 0 0 4
4 0 0 0 0 0 4
4 0 0 0 0 0 4
4 4 4 4 4 4 4
0 0 0 0 0 0 4
0 0 0 0 0 0 4
0 0 0 0 0 0 4
Solve

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Last Solution submitted on May 26, 2026

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