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