n=4的一些解
..0..1..0....0..2..1....2..1..0....1..0..0....0..1..1....1..0..1....2..0..1
..1..1..1…..0..2..1…..0...2…..1.0...0…..0...2…..2...2...0...2...2...1..1
..1..1..2....0..1..2....2..1..1....1..1..1....1..1..1....0..1..2....0..1..2
..0..2..2....0..1..2....2..1..1....1..0..2....1..1..1....0..1..2....0..2..2
..1..2..2....2..2..2....0..2..2....1..2..1....0..2..2....2..2..2....1..2..2
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