n=4的一些解
..0..2..1..1..2..1..1....2..2..2..2..2..2..2....0..2..0..1..2..1..1
..1.1.2.2.2.2.1.2.2.2.2.2.2.2.2.2.2.2.2.2...2...2...2.2.2.2.2...2.2.1.2.2.2.2.2.2.2.2.2.2.2.2.2
..1..2..1..1..2..1..1....2..2..2..2..2..2..2....0..2..1..0..2..2..2
..2..1..2..2..1..2..2....2..2..2..2..2..2..2....1..1..2..1..1..1..1
..2..2..1..1..2..1..1....2..2..2..2..2..2..2....1..1..2..2..2..2..2
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