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