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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“The dance was spontaneous. We just did what we did,” said the police captain Lertvarit Lertvorapreecha, adding that nobody had time to practise. In his haste, he accidentally picked up his colleague’s male mask, which he wore with a red silk dress, trousers and tactical shoes.。业内人士推荐搜狗输入法2026作为进阶阅读
与其说是技术问题，不如说是一个被长期忽视的基础工程问题。