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