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This problem is sometimes referred to as the 17x17 challenge. See also Part 1 and Part 2 of this problem. This time, your job is to construct, for the given n, an n-by-n matrix in which there are no rectangles. A rectangle is a formed whenever four instances of the same value appear in the corners of a rectangular region of the matrix.

Examples:

Input n = 3

Output a = [ 4 1 2 1 4 3 2 1 1 ]

Input n = 5 Output a = [ 4 1 2 4 1 3 3 2 1 4 3 2 4 1 1 1 4 3 2 2 1 1 1 4 4 ]

The answer for a given n is not unique. The test suite will just guarantee that there are no rectangles present.

**Note 1.** I am using Alfonso's solution 191508 from problem 514 as my testing code. Cody in the service of Cody!

**Note 2.** You can easily answer this problem with a pre-computed response. You could do that, but it would be lame. We want to see your code!

12 correct solutions
21 incorrect solutions

Last solution submitted on Feb 21, 2015

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