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。
The team on the ground held its breath until the parachutes deployed and the crew was safely down.
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very first implementation of the concept, the 2984 was an important step in ATM
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