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)。
Both the defendants and the plaintiff have pointed to a turbulent home life for Kaley. Her attorneys say she was preyed upon as a vulnerable user, but attorneys representing Meta and Google-owned YouTube have argued Kaley turned to their platforms as a coping mechanism or a means of escaping her mental health struggles.，详情可参考51吃瓜
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Digital access for organisations. Includes exclusive features and content.，详情可参考下载安装 谷歌浏览器 开启极速安全的 上网之旅。
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