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The 473x series was such a flop that it is hard to even figure out the model
。safew官方版本下载是该领域的重要参考
思路：先对 nums2 用单调栈求每个元素的下一个更大值，存入 Map 缓存；再遍历 nums1 直接查 Map 得结果。时间复杂度 O(len1 + len2)。
The city of Anvil, rendered in The Elder Scrolls III: Morrowind.