Monotonic (8)

1. Next Greater Element
2. Next Greater Element - 2
3. Next Smaller Element
4. Number of Greater Elements to the Right
5. Trapping Rainwater
6. Sum of Subarray Minimums
7. Asteroid Collision
8. Sum of Subarray Ranges
9. Remove K Digits
10. Largest rectangle in a histogram
11. Maximum Rectangles

• https://leetcode.com/problems/next-greater-node-in-linked-list