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