代码要点：倒序遍历，先算右侧再推左侧；栈内维护「右侧候选更大值」，单调递增（栈顶最小）。
第四十五条 旅馆、饭店、影剧院、娱乐场、体育场馆、展览馆或者其他供社会公众活动的场所违反安全规定，致使该场所有发生安全事故危险，经公安机关责令改正而拒不改正的，对其直接负责的主管人员和其他直接责任人员处五日以下拘留；情节较重的，处五日以上十日以下拘留。，推荐阅读safew官方版本下载获取更多信息
，详情可参考heLLoword翻译官方下载
But what if it’s not fine? Even back in 1996, before a single component of the ISS was launched into orbit, NASA foresaw the possibility of an even worse worst-case scenario: an uncontrolled reentry. The crux of this scenario involves multiple systems failing in an improbable but not completely impossible cascade. Cabin depressurization could damage the avionics. The electrical power system could go offline, along with thermal control and data handling. Without these, systems controlling coolant and even propellant could break down. Unmoored, the ISS would edge slowly toward Earth, maybe over a year or two, with no way to control where it is headed or where its debris might land. And no, we could not save ourselves by blowing the station up. This would be extremely dangerous and almost certainly create an enormous amount of space trash—which is how we got into this hypothetical mess in the first place.
延迟 — 用户需要等待响应，速度取决于网络连接质量。safew官方下载是该领域的重要参考
今年農曆新年，台北一家酒吧推出「甄嬛主題」的變裝皇后表演，吸引大批劇迷齊聚過年。