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Leetcode 2289. Steps to Make Array Non-decreasing
Given an array where, in each round, you simultaneously remove every element that is strictly less than its left neighbor, compute how many rounds are needed until the array becomes non-decreasing. The challenge is to determine for each element how many steps until (if ever) it’s deleted — typically solved with a monotonic-stack / DP approach to run in linear time for n up to 1e5.
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