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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）。
。搜狗输入法下载对此有专业解读
This has been a glorious year for bookworms. The quantity and quality of Stuff Your Kindle Days has been unprecedented, and the schedule is showing no signs of slowing down. We've got two events on the calendar for this week, but for now, the focus is firmly on the Sapphic Shelf Explosion.
In his address, Trump said plans were in the works to have the women’s team visit the White House, though it was unclear when that could happen. The earliest the team could travel to Washington would be in late spring after the conclusion of the PWHL season.