Create an N×N binary matrix that forms a filled diamond shape centered in the matrix. The diamond expands symmetrically toward the center row and contracts afterward, creating a visually pleasing mandala-style pattern.
Example (N = 5):
11011
10001
00000
10001
11011
Solve

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Last Solution submitted on Jun 02, 2026

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Chris Cleveland ChrisR Riccardo G. Lorenzo

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