我们要构建一个通信系统。这个系统包含若干个设备，对于每个设备，我们都可以从不同的商家购买。从不同商家购买的同种设备，在最大带宽和价格上都有所区别。

整个系统的带宽B是指它包含的所有设备的最大带宽的最小值。整个系统的代价P是指，它包含的所有设备的价格之和。我们的目标是确定一个购买方案，使得整个系统的性价比B/P最高

-We want to build a communication system. The system consists of several devices, for each device, we can buy　different businesses. Purchased　different vendors the same kind of equipment, the maximum bandwidth and price are the difference.

B Bandwidth refers to the minimum value of the entire system and it contains the maximum bandwidth of all devices. P is the price of the system means that the price of the equipment it contains and all. Our goal is to determine a later program, so that the overall system cost B/P highest