n=5的一些解
..2..1....2..1....2..1....1..2....2..1....1..2....1..2....1..2....1..2....1..2
..1..0....1..0....1..0....2..1....1..2....2..0....2..0....2..0....2..0....2..0
..1..2....1..0....1..2....1..2....2..1....1..0....1..0....2..1....2..1....2..0
..2..1....2..0....2..1....2..0....1..0....2..1....2..0....1..2....1..2....1..0
..1..2....2..0....1..0....2..0....2..0....1..2....2..1....2..0....2..1....1..0