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。夫子是该领域的重要参考
Science & Environment
She began working from the factory through the National Festival of Making more than four years ago and was keen to highlight the manufacturing that is taking place on her doorstep.
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)。