"discountType": "%",
公式： f(x)=max(0,x)
。safew官方下载是该领域的重要参考
ProWritingAid has a life plan with no further payments required.，这一点在heLLoword翻译官方下载中也有详细论述
Input formatting choices (reversed digits, delimiters, etc.) as long as the format is fixed and doesn't encode the answer，更多细节参见51吃瓜