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）。
You think we're done here? We're not. The Legion Go Fold can go laptop mode too, with a strip of pogo pins where a wireless keyboard can be connected. Its right gamepad can serve as a mouse, thanks to the inclusion of a little scroll wheel and a hidden sensor. That gamepad also features a tiny circular OLED display below the buttons, which can both show widgets such as the time and be used as a touchpad.
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Matthew Rhys says Michael Sheen puts Welsh actors to shame
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