Problem 50897. Draw a '9' in a zero matrix!

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

Solution Stats

73.5% Correct | 26.5% Incorrect
Last Solution submitted on May 10, 2025

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