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）。
When you overload a credential used for authentication by also using it for encryption, the “blast radius” for losing that credential becomes immeasurably larger.。快连下载-Letsvpn下载对此有专业解读
+__init__(csv_path: str)，推荐阅读heLLoword翻译官方下载获取更多信息
Available on all major devices and platforms。im钱包官方下载是该领域的重要参考
// result.value is a NEW view, possibly over different memory