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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Violent confrontations in the world’s youngest country between the military, which is loyal to President Salva Kiir, and insurgents believed to be allied to the suspended vice-president, Riek Machar, have increased in recent weeks.，更多细节参见一键获取谷歌浏览器下载
So how does Matter fit in?If you’re going to have a network of devices (or an Internet of Things), then they need to be able to talk to each other, and that’s where Matter comes in. Matter is a smart home standard that hardware makers can bake into their tech that automatically makes them compatible with one another and with the major smart home platforms like Alexa, Apple HomeKit, and Google Home, all of which are Matter certified.