篮球赛抽签系统，先输入球队数，由随机函数在1-N抽取一个数，作为初始密码，出列第一支球队，然后根据各队输入本队密码，利用joseph环，使每次出列的球队密码作为新的密码，直到所有球队出列，即可确定分组顺序-Basketball lottery system, first enter the team number by the random function in the 1-N taken a number, as the initial password, the first teams out of the column, and then each team enter the team password, using joseph ring, so that each second team out of the column as a new password password, until all the teams out of the column, you can determine the packet sequence