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）。
Reporters Ahmed Abdigadir and Julia Lindblom outside Synsam’s flagship store in Gothenburg. Foto: Olof OhlssonThroughout the autumn of 2025, we visit ten retailers in Stockholm and Gothenburg to ask the sales staff how the data from the Meta glasses is processed. Several of the sales people give us reassuring answers. We are told that we ourselves can choose exactly what data is shared with Meta.
，这一点在币安_币安注册_币安下载中也有详细论述
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One challenge is having enough training data. Another is that the training data needs to be free of contamination. For a model trained up till 1900, there needs to be no information from after 1900 that leaks into the data. Some metadata might have that kind of leakage. While it’s not possible to have zero leakage - there’s a shadow of the future on past data because what we store is a function of what we care about - it’s possible to have a very low level of leakage, sufficient for this to be interesting.