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