首先把三根柱子按顺序排成品字型，把所有的圆盘按从大到小的顺序放在柱子A上，根据圆盘的数量确定柱子的排放顺序：若n为偶数，按顺时针方向依次摆放 A B C；若n为奇数，按顺时针方向依次摆放 A C B。-First, the three pillars of order to the finished fonts, all the disks in sequence on the pillar by A, according to the number of disk emission to determine the order of columns: if n is even, turn clockwise placed ABC　if n is odd, in a clockwise direction in order placed ACB.