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)。
void *data = &h[1];
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I’m still a beginner with these tools, but I’m very enthusiastic about exploring them further and integrating them into my future projects (I still need to automate encryption by overriding Anaconda’s Kickstart and test deployment on bare-metal).