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