n=4的一些解
..3..1..2....3..2..0....0..3..1....1..0..2....1..3..1....2..0..3....0..3..0
..1..3..0....2..1..2....1..0..2....0..2..3....0..1..2....1..3..1....3..0..1
..0..1..2…..3.0..1..2..3.0..3..1...0...2...3...0...3...3...3...0...0...2...2...1...2
..2..3..0....1..3..0....3..1..2....1..3..2....3..0..2....2..1..0....1..2..3
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