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And his latest book, Chaos in the Box: get it now
，更多细节参见爱思助手下载最新版本
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)。
The 2984 was a huge step forward. Unlike the token-based machines of the 1960s,
particular skills or qualifications that could be useful