问题描述：假设在周末舞会上，男士们和女士们进入舞厅时各自排成一队。跳舞开始时，依次从男队和女队的队头上各出一人配成舞伴。若两队初始人数不相同，则较长的那一队中未配对者等待下轮舞曲。 -Problem Descr iption: Suppose the ball at the weekend, men and women when they enter the ballroom lined up a team of their own. Dancing began, followed by