"I have to walk two hours a day to come into town to get food," he says, preferring to find shelter outside of the city centre where he feels safer, sleeping in a one-man tent under a bridge.
Dynamic AMOLED 2X, 120Hz adaptive refresh (1–120Hz), Up to 2,600 nits peak brightness, Corning Gorilla Glass Victus 3
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按位排序：从最低位到最高位，每位用计数排序
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）。