n=4的一些解
..1..3..0..1....2..3..1..3....1..3..2..1....1..3..2..1....3..1..1..2
..0...0..1..1…..2...1..1…..1...0...3…..1.2...2...1…..0..1..1...0
..0..1..1..3....3..2..0..1....2..3..3..0....0..2..0..3....0..0..3..0
..3..1..3..1....0..3..3..1....0..2..1..3....0..0..2..1....1..1..2..0
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