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