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