// create it here and provide it as an import.
How exactly horses produce that distinctive sound – also called a neigh – has long eluded scientists.，推荐阅读51吃瓜获取更多信息
。关于这个话题，服务器推荐提供了深入分析
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。，详情可参考safew官方版本下载
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