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)。
be difficult to set up，这一点在搜狗输入法下载中也有详细论述
"The beverage industry is actually a system of small, independent businesses, some of which have been in the same families for generations," a spokesman for the American Beverage Association tells the BBC. "Many produce brands that have been around for more than 100 years."，详情可参考WPS官方版本下载
반려견놀이터에 ‘낚싯바늘 빵’ 던져놓은 60대…“개 짖는 소리 시끄러워”，详情可参考同城约会
This free live stream on ICC.TV is only available in select regions (see full list of territories here), but anyone can live stream the T20 Cricket World Cup for free with a VPN. These helpful tools can hide your IP address (digital location) and connect you to a secure server in a location with free access. This simple process bypasses geo-restrictions so you can live stream on ICC.TV from anywhere in the world.