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）。
“Agent经济学”能否成立，2026年将是关键验证窗口。如果企业开始愿意为AI Agent支付真金白银，而非仅仅将其视为“效率工具”或“成本中心”，那么中下游企业的估值修复将带来巨大的投资机会。反之，如果AI Agent始终停留在“试点项目”阶段，无法实现商业化落地，上游硬件股的估值压缩将远未结束。
，这一点在heLLoword翻译官方下载中也有详细论述
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Thomas Clements’ eyes begin dancing as he recalls in vivid detail his first trip to Highbury. It was 1995 and Ian Wright was among the scorers as QPR were defeated. Clements – named after Michael Thomas, scorer of Arsenal’s decisive second goal against Liverpool in their 1989 title decider – points to his dad, Kevin, standing a metre away. “I was sat on his shoulders in the North Bank,” he says.