开关灯操作 一共N盏灯，都点亮，N个操作员顺序操作 操作一次，灯的亮暗就变化一次， 且每个操作员只操作自己的序号能整除的序号的灯 -Switch lights operate a total of N lights are lit, N-operator operates the operation sequence once, lights concealed on the change once, and each operator can only operate its