Given an array nums of integers, a ramp is a tuple (i, j) for which i < j and nums[i] <= nums[j]. The width of such a ramp is j - i.
Find the maximum width of a ramp in nums. If one doesn't exist, return 0.
Example 1:
Input: nums = [6,0,8,2,1,5] Output: 4 Explanation: The maximum width ramp is achieved at (i, j) = (1, 5): nums[1] = 0 and nums[5] = 5.
Example 2:
Input: nums = [9,8,1,0,1,9,4,0,4,1] Output: 7 Explanation: The maximum width ramp is achieved at (i, j) = (2, 9): nums[2] = 1 and nums[9] = 1.
Note:
2 <= nums.length <= 500000 <= nums[i] <= 50000
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