Solution: Maximum Width Ramp
Explore how to solve the maximum width ramp problem by using a stack to track candidate indices. Understand the greedy approach that efficiently finds valid ramps by scanning the array twice. Learn to implement and analyze this stack-based solution with linear time and space complexity.
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Statement
A ramp in an integer array nums is defined as a pair of indices (i, j) such that i < j and nums[i] <= nums[j]. The width of such a ramp is j - i.
Given an integer array nums, find and return the maximum width of any ramp in nums. If no valid ramp exists, return