Problem Given an integer array nums, find a subarray that has the largest product, and return the product. A subarray is a c...

Problem Given the head of a linked list, remove the nᵗʰ node from the end of the list and return its head. https://leetcode.c...

Problem You are given the head of a singly linked-list. The list can be represented as: L0 → L1 → … → Ln - 1 → Ln Reorder t...

Problem There is an undirected tree with n nodes labeled from 0 to n - 1, and rooted at node 0. You are given a 2D integer ar...

Problem Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i != j, i != k, and j != k...

Problem Given a string s and a dictionary of strings wordDict, return true if s can be segmented into a space-separated seque...

Problem You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of th...

Problem Given a string s, return the number of palindromic substrings in it. A string is a palindrome when it reads the same ...

Problem Given a reference of a node in a connected undirected graph. Return a deep copy (clone) of the graph. Each node in th...

Problem Given a string s, return the longest palindromic substring in s. A string is palindromic if it reads the same forwar...

Problem You are given a sorted array consisting of only integers where every element appears exactly twice, except for one el...

Problem Given a string s, find the length of the longest substring without repeating characters. A substring is a contiguous...

Problem Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. You must wr...