• The best running shoes, tested
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)。
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"I was reading a magazine article on the Gemini astronauts. I was probably nine years old, and I thought that's the coolest thing. That's what I want to do," she says.