Some solutions for n=5
...0...............0...............0...............0...............0
..-2.-1...........-1..0...........-1..1...........-2..0............2..1
...0..1..3........-3.-2..0........-3.-1..1........-1..0.-1.........0.-1..1
...2..1..2..0.....-1.-3.-1.-2.....-3.-3.-1..0.....-2..0.-1..0.....-2.-1..1..2
...4..3..4..2..3...0.-1.-3.-4.-3..-5.-4.-3.-1..0..-1.-1.-2..0..0..-4.-2.-1..0..1
|