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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Израиль нанес удар по Ирану09:28
He suggests that the smoke alarm industry has a responsibility to reduce nuisance alarms, which sometimes cause people to deactivate or uninstall the devices – a huge safety risk.。搜狗输入法2026是该领域的重要参考