Nearly £50m of taxpayers' money has been paid by the NHS to an outsourced firm assessing claims of medical harm caused by vaccines, the BBC has found.
// 单调栈：存储索引（而非值），栈内索引对应的nums值保持「单调递减」
。业内人士推荐Line官方版本下载作为进阶阅读
actual typealias PlatformByteArray = platform.Foundation.NSData
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）。