假币问题的源码，通过三次天平比较，从12枚外形一致的金币中找出唯一的假币并判断假币重量高于(低于）真币-Counterfeiting problem of the source, by comparing three scales, from 12 the same shape, only to find gold coins in counterfeit money counterfeit money and determine the weight of higher (lower) rea