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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14:01, 27 февраля 2026Россия，详情可参考51吃瓜
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Then, over the last week, online researchers found that Persona, another company Discord had partnered with in the UK for age verification, had left thousands of files exposed on the open internet.