Longest Nice Substring

Maximum Sum of Subsequence With Non-adjacent Elements

Number of Pairs Satisfying Inequality

Find the Index of Permutation

Count Nodes That Are Great Enough

Reverse Pairs

Balance a Binary Search Tree Problem

Construct Binary Tree from Inorder and Postorder Traversal

Construct Binary Tree from Inorder and Preorder Traversal

Convert Sorted List into a height-balanced Binary search Tree

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