n=4的一些解
..1..3..2..2..1....3..3..0..3..1....0..1..3..2..0....0..3..3..3..2
..1..2..2..0..1....1..3..3..3..1....0..1..1..1..1....2..1..1..1..1
..3..2..0..0..0....1..1..3..2..1....0..0..2..3..1....0..3..2..1..2
..3..1..1..0..2....3..1..1..2..1....3..0..2..1..1....3..3..1..1..2
..2..2.2...0...2..3.2...0...2...0...0...3...0...0...0...0...2...1...2...2
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