Group Anagrams LeetCode Solution
Given an array of strings strs, group the anagrams together. You can return the answer in any order.
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Reverse Linked List LeetCode Solution
Given the head of a singly linked list, reverse the list, and return the reversed list.
Longest Substring Without Repeating Characters LeetCode Solution
Given a string s, find the length of the longest substring without repeating characters.
Two Sum LeetCode Solution
Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You may assume that each input would have exactly one solution, and you may not use the same element twice.