栈（stack）是先进后出的数据结构。单调栈在入栈时通过一定规则保持栈内元素有序（单调递增或单调递减），从而把「找左侧/右侧第一个更大/更小元素」从 O(n²) 降到 O(n)。
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On Thursday, Block CEO Jack Dorsey said that the company was laying off 4,000 of its more than 10,000 workers, partly because of AI. The company has developed its own internal AI agent, called Goose, that can be powered by a range of different AI models and plug-in directly to a computer to draw from its files and folders as well as access cloud storage platforms and online databases, Wired reported.
Трамп высказался о непростом решении по Ирану09:14
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