n=4的一些解决方案:
..1....2....0....1....0....3....2....1....4....0....1....4....1....3....0....3
..2....2....1....4....3....2....2....2....3....3....0....3....4....4....3....0
..0....1....0....1....2....0....3....4....1....1....4....1....2....1....2....2
..2....1....4....3....1....1....3....1....1....2....3....0....1....4....1....4
..1....4....3....0....4....0....0....4....3....1....2....4....0....3....0....1
..0….3….4….0….3….3….0….2….3….4….1….2….2….2….2….2….2….2….4
..2....2....0....2....1....4....3....3....1....0....3....3....0....4....4....2
..2....2....0....1....4....0....2....4....2....0....0....2....3....4....0....4
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