let messageString =
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）。，更多细节参见heLLoword翻译官方下载
The US has been accused of “shameless exploitation” over a health financing agreement with Zambia worth more than $1bn (£740m), amid warnings that the country is getting a raw deal from the Trump administration.。业内人士推荐Line官方版本下载作为进阶阅读
IBM, to secure the 2984's network connection, turned to an algorithm recently