n=4的一些解
..2..1..1....2..0..1....1..1..1....2..1..0....0..1..1....2..2..2....2..0..2
..2..0..2....0..0..2....0..2..1....2..0..2....0..0..2....0..1..2....2..2..0
..1..2..2....1..0..2....2..2..2....1..1..1....0..1..0....2..2..2....0..2..2
..1..2..2....0..1..0....0..2..1....1..1..1....1..1..0....0..1..2....2..0..2
..1..2.2...2...1..2.2...2...2...2...2...0...2...0...0...2...2...2...2...2...2...2...2...2...2...2...2
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