Problem 50912. Draw a '0' in a one matrix!

Given a x-by-x matrix filled with ones (x is odd and > 3). Use 0s to draw a number 0 into it! Like this:
x = 5, y =
1 0 0 0 1
0 1 1 1 0
0 1 1 1 0
0 1 1 1 0
1 0 0 0 1
x = 7, y =
1 0 0 0 0 0 1
0 1 1 1 1 1 0
0 1 1 1 1 1 0
0 1 1 1 1 1 0
0 1 1 1 1 1 0
0 1 1 1 1 1 0
1 0 0 0 0 0 1
Solve

Solution Stats

43.77% Correct | 56.23% Incorrect
Last Solution submitted on Nov 14, 2025

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