思路：单调递减栈，找「上一个比当前价格大的元素索引」。正序遍历，弹出所有 ≤ 当前价格的索引；跨度 = 当前索引 - 栈顶索引（栈空则为 当前索引 + 1）。
从事旅馆业经营活动有下列行为之一的，对其直接负责的主管人员和其他直接责任人员处一千元以上三千元以下罚款；情节严重的，处五日以下拘留，可以并处三千元以上五千元以下罚款：
，详情可参考51吃瓜
Author(s): Marco Seiz, Tomohiro Takaki，推荐阅读快连下载安装获取更多信息
But e-bikes containing lithium-ion batteries are a newer challenge. "When a battery fails, it doesn't necessarily ignite, it will often produce some off-gases," says Stephen Welch, senior lecturer at the University of Edinburgh's Fire Research Centre. "Those off-gases are toxic and flammable. If they accumulate, you can have an explosion risk."