暴力做法是对每个位置向右扫描找第一个更大值，O(n²)。可抽象为：元素像一排人，身高为数值。当前人「下一个更大」= 他右侧第一个没被挡住的人（比当前矮的都被挡住）。单调栈用 O(n) 维护「右侧候选更大值」：倒序遍历，弹掉 ≤ 当前的，栈顶即答案，再入栈当前值。
Firefighters in Sicily have rescued about 400 rare books from a library in Niscemi that hangs on the edge of a mudflow, after a devastating landslide in January tore away an entire slope of the town and carved a 4km chasm.
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"Without the co-CEO structure, the trade off would have either been too great for the business, or too great for the way that we wanted to have our children and have maternity leave," she reflects.，推荐阅读Line官方版本下载获取更多信息
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But previous analysis by the BBC Shared Data Unit estimated that the defences not maintained by the EA were 45% more likely to be below target.