思路：找「右侧第一个 ≤ cur」的元素 → 弹出所有 cur 的元素，栈顶即为折扣。最终价格 = cur - 折扣（有则）或 cur（无则）。
* iOS 平台的ByteArray类型实现
。业内人士推荐雷电模拟器官方版本下载作为进阶阅读
数据显示，在去年4月中国实施出口管制后的八个月内，中国对美出口的钇类产品仅17吨，而此前八个月相关出口量为333吨，降幅极为显著。
These are likely to be older patients who have suffered falls and those with broken hips.
The head of the theatre hosting the Shen Yun dance troupe in Sydney says the company would not be intimidated to pull the shows by any “outrageous” anonymous threats and that the publicity had increased interest in the show.