n=4的一些解
..0..0..0..0..1..1....0..1..1..0..2..3....0..1..1..2..2..3....0..1..1..0..2..1
..2..0..2..0..0..1....2..0..1..1..0..2....0..0..1..1..2..2....1..1..0..3..0..2
..3...2...2...0...0...0...1...2...1...0...3.0...1...1...2...3...1...3...1...0...1...0...1...1...0
..3..3.2...2...2...0...2...0...1...0...2...0...1...0...1...2...3...1...2...1...2...3...1...2...2...1
..3..1..3..2..3..2....1..2..0..1..1..0....1..2..1..0..0..1....1..2..3..1..1..0
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