For a positive integer n create the identity matrix with n elements.

In case it is not possible to produce an identity matrix with exactly n elements, return an empty matrix.

Examples:

Input:  n = 9
Output: I = [1 0 0
             0 1 0
             0 0 1]

Input:  n = 8
Output: I = []
Solve

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Last Solution submitted on Mar 11, 2026

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Vasilis Bellos Matthew Bolyard Roberto Lorenzo

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