Given the head node of a linked list, return the node where the cycle starts. If cycle does not exist, return null. Do not modify the linked

Given the head node of a singly linked list, determine if the linked list has a cycle in it. A linked list has a cycle if some node in the

Given an array of integers nums and an integer k, return the kth largest element in the array. Note that you have to return the kth largest

Given the root node of the binary tree and an integer targetSum, return all root to leaf paths in this tree such that, sum of these paths is

Given two strings s and t, return true if t is a valid anagram of s. Otherwise return false. An anagram is a word or phrase made by

Given the root node of a binary tree and an integer targetSum, return true if the tree has a path from root-to-leaf such that the sum of all