思路：单调递减栈，找「上一个比当前价格大的元素索引」。正序遍历，弹出所有 ≤ 当前价格的索引；跨度 = 当前索引 - 栈顶索引（栈空则为 当前索引 + 1）。
"userId": "some_user_id",。同城约会是该领域的重要参考
The US Federal Aviation Administration (FAA) said it was aware "an anomaly occurred" during the SpaceX mission.。搜狗输入法2026是该领域的重要参考
Homes on a street at severe risk of flooding will be bought by a local council and demolished as they remain at risk of further damage.