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