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It's a magic number...

To help you get rid of that earworm, here's a new Cody problem. You are given a square matrix containing positive integers. We want to determine if there are three consecutive occurrences of the same number in a row or column. For example:

1 1 1 4 2 3 2 3 4

Should be marked "true" because there are three consecutive ones in the first row. Likewise

5 2 3 5 3 2 5 4 1

should also be marked "true" because there are three consecutive fives in the first column. However:

5 2 3 3 5 2 1 4 5

Is false, as we do not care about the three consecutive fives along the trace of the matrix. The matrix will always be at least 3x3, but they can be larger. Good luck!

27 correct solutions
35 incorrect solutions

Last solution submitted on Apr 23, 2015

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