n=4的一些解
..3..0..1..0..1..2..1..1....1..0..0..0..0..3..1..2....0..1..1..1..1..2..1..2
..0...0...1.0...0...2...1...2...1...0...1...2...1...1...3...2...2...2...0...0...1...3
..0..1..0..1..0..0..1..0....1..0..0..1..0..0..1..0....0..1..0..0..2..0..1..1
..1..0..0..0..1..0..2..2....0..1..1..0..0..1..0..1....2..1..2..0..1..0..0..2
..1..1..0..2..1..1..1..3....1..0..2..1..1..1..0..0....2..1..2..1..1..0..2..0
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