Department of State authorises non-essential officials to leave, with embassy staff told to book flights to anywhere
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。
。关于这个话题，Line官方版本下载提供了深入分析
Estimated shortcuts: ~91 million (a manageable number for global routing)
The government said £50m of funding, provided over three years, would be provided to councils and frontline homelessness services.