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)。
Contact me with news and offers from other Future brands。业内人士推荐WPS官方版本下载作为进阶阅读
，详情可参考safew官方版本下载
response: result,
Nicky Hilton Rothschild, Joe Locke, Gugu Mbatha-Raw and Lily Collins were all sat front row to see his latest collection.，推荐阅读搜狗输入法下载获取更多信息
Using the CPI measure, the government says resident doctors' current pay is fair.