思路：链表转数组 + 单调栈（从后往前遍历）。与「下一个更大元素」模板一致，仅需将链表值先提取到数组。
Senior security officials are gathered in a control room almost 3km (1.9 miles) away, near a complex of government offices.
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The UK government has been investing heavily in renewable energy in its bid to meet 95% of electricity demand with clean power by 2030.
The practical implementation involves thinking about the conversation your audience wants to have rather than the keywords they might type. What are they trying to accomplish? What confuses them? What decisions are they facing? What objections or concerns do they have? When you address these elements in natural, conversational language, you simultaneously create content that people find valuable and that AI models recognize as comprehensive answers to common questions.