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）。
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Nancy Guthrie, 84, was abducted from her home near Tucson, Arizona, prompting a widespread search and appeals from her family.，推荐阅读旺商聊官方下载获取更多信息
Two stories about the Claude maker Anthropic broke on Tuesday that, when combined, arguably paint a chilling picture. First, US Defense Secretary Pete Hegseth is reportedly pressuring Anthropic to yield its AI safeguards and give the military unrestrained access to its Claude AI chatbot. The company then chose the same day that the Hegseth news broke to drop its centerpiece safety pledge.