[Programming Problem] Valid Palindrome IV
Valid Palindrome IV [Problem Link] You are given a 0-indexed string s consisting of only lowercase English letters. In one operation, you can change...
[Programming Problem] Number of Pairs of Strings With Concatenation Equal to Target
[Problem Link] Given an array of digit strings nums and a digit string target, return the number of pairs of indices (i, j) (where...
[Programming Problem] Subsets II
Given an integer array nums that may contain duplicates, return all possible subsets (the power set). The solution set must not contain duplicate subsets....
[Programming Problem] Flatten Binary Tree to Linked List
Given the root of a binary tree, flatten the tree into a “linked list”: – The “linked list” should use the same TreeNode class...
[Programming Problem] Largest Number
Given a list of non-negative integers nums, arrange them such that they form the largest number and return it. Since the result may...
[Programming Problem] Sum Root to Leaf Numbers
You are given the root of a binary tree containing digits from 0 to 9 only. Each root-to-leaf path in the tree represents...
[Programming Problem] Reverse Linked List II
Given the head of a singly linked list and two integers left and right where left <= right, reverse the nodes of the list...
[Programming Problem] Jump Game II
Given an array of non-negative integers nums, you are initially positioned at the first index of the array. Each element in the array represents...
[Programming Problem] Find Minimum in Rotated Sorted Array II
Suppose an array of length n sorted in ascending order is rotated between 1 and n times. For example, the array nums = [0,1,4,4,5,6,7]...
[Programming Problem] Find Minimum in Rotated Sorted Array
Suppose an array of length n sorted in ascending order is rotated between 1 and n times. For example, the array nums = [0,1,2,4,5,6,7]...