<ul><li>You are given two distinct 0-indexed integer arrays nums1 and nums2, where nums1 is a subset of nums2.</li><li>For each element in nums1, find the next greater element in nums2 and return as an array.</li><li>The brute-force solution has a time complexity of O(m × n), but a better approach using a monotonically decreasing stack reduces it to O(m + n).</li><li>The algorithm involves utilizing a stack to efficiently find the next greater element and mapping the results to nums1.</li></ul>

Leetcode #496: Next Greater Element

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