（一）为违法的应用程序提供电子签名、制作、封装、发布或者以测试为名提供下载等服务的；
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。
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communications were widely used in the military during the second World War and