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