n=4的一些解
..0..0..0….0..3..0….0..0..0..0..0..3..0….2..2..0….0..0..0..0..0..0..0
..2..2..0….0..0..3….0..0..1..1..0….0..0..0….2..2..1….1..3..0
..2..2..0….0..3..0….0..3..3..0..0….1..0..1..0..0..0..0..0..0..0..0
..0..0..0….0..1..1….0..0..0..1..1..0..3..0….1..0..0….0..0..0..0..0..0..0
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