Given n as input Draw a 'X' in a n-by-n matrix.

example:

n=3
y=[1 0 1
   0 1 0
   1 0 1]

n=4
y=[1 0 0 1
   0 1 1 0
   0 1 1 0
   1 0 0 1]
Solve

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Last Solution submitted on Feb 12, 2026

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泽伟 龙 灰 夕

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