One of the biggest developments in the fire alarm space in recent years has been the rise of smart tech – wi-fi connected alarms that reach you by phone, for example, if they sense smoke while you are out.
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)。。im钱包官方下载对此有专业解读
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The 24-year-old, whose hits include Illegal, Stateside and Boy's A Liar, is the first woman to be given the prize since its inception in 1977.