A new study shows that exposure to two specific 'forever chemicals' may accelerate biological aging, especially in middle-aged men. Researchers revealed a link between faster epigenetic aging, and two of these alternatives, PFNA and PFOSA, a precursor of PFOA.

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* 解题思路: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

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