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Destcription Given the root of a binary tree, construct a string consisting of parenthesis and integ

Description Given a binary tree, determine if it is height-balanced Example 1: Example 2: Example 3:

Description Given a binary tree, find its minimum depth. The minimum depth is the number of nodes al

Description Given a sequence of K elements, we can calculate its difference sequence by taking the d

Description Given the head of a linked list and an integer val, remove all the nodes of the linked l

Description You are given the heads of two sorted linked lists list1 and list2. Merge the two lists

There is an integer array nums sorted in ascending order (with distinct values). Prior to being pass

You are given an integer array nums of length n. Assume arrk to be an array obtained by rotating num

You are given an integer array height of length n. There are n vertical lines drawn such that the tw