mono stack
1130. Minimum Cost Tree From Leaf Values1673. Find the Most Competitive SubsequenceAgreegate element on ..range1996. The Number of Weak Characters in the Game739. Daily Temperatures84. Largest Rectangle in Histogram ( mono increasing stack456. 132 Pattern496. Next Greater Element I503. Next Greater Element II581. Shortest Unsorted Continuous Subarray907. Sum of Subarray Minimums1856. Maximum Subarray Min-Product2104. Sum of Subarray Ranges1966. Binary Searchable Numbers in an Unsorted Array1762. Buildings With an Ocean View901. Online Stock Span402. Remove K Digits316. Remove Duplicate Letters, 1081. Smallest Subsequence of Distinct Characters255. Verify Preorder Sequence in Binary Search Tree
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