n=4的一些解决方案:
..1..1..0....0..1..1....0..1..1....1..1..0....0..1..1....1..1..0....0..0..0
..0..1..1....1..1..0....0..1..1....0..1..1....1..1..0....0..1..1....1..1..0
..0..1..1....1..1..0....0..1..1....0..0..0....0..0..0....1..1..0....0..0..0
..0..0..0....1..1..0....1..1..0....0..0..0....1..1..0....0..0..0....1..1..0
..0..1..1....0..1..1....0..1..1....1..1..0....0..0..0....0..0..0....0..1..1