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