2d array permutation proof [migrated]
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FGM
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Published on 2014-06-03T17:17:51Z
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2014/06/03
21:42 UTC
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Hit count: 170
mathematics
I want to know if it's possible to get any possible combination of a 4x4 integer array given three rules:
- you may shift any column up or down
- you may shift any row left or right
- you may shift the entire array left, right, up, or down
That is, you can transform:
[1] [2] [3] [4]
[5] [6] [7] [8]
[9] [10] [11] [12]
[13] [14] [15] [16]
into any possible combination of a 4x4 array of the same 16 values, given those three rules.
Basically, I just want to know if there are impossible combinations.
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