4、　　某银行营业厅共有6个营业窗口，设有排队系统广播叫号，该银行的业务分为公积金、银行卡、理财卡等三种。公积金业务指定1号窗口，银行卡业务指定2、3、4号窗口，理财卡业务指定5、6号窗口。但如果5、6号窗口全忙，而2、3、4号窗口有空闲时，理财卡业务也可以在空闲的2、3、4号窗口之一办理。

客户领号、业务完成可以作为输入信息，要求可以随时显示6个营业窗口的状态。

-1, a total of six operating window, a bank business hall is equipped with radio station queuing system, the bank s business is divided into reserve, such as credit CARDS, wealth management card 3 kinds. Accumulation fund business window, specify 1 card business specified number 2, 3, 4 window, banking card business specified window 5 and 6. But if window no. 5, 6, and 2, 3, 4 window has free time, banking card business can also be free of 2, 3, 4 one window to handle.

The customer brought the number can be used as input information, business is complete, requires 6 operating state of the window can display at any time.