Given the head of a linked list, return the node where the cycle begins. If there is no cycle, return null. There is a cycle in a linked list if there is some node in the list that can be reached agai

Given head, the head of a linked list, determine if the linked list has a cycle in it. There is a cycle in a linked list if there is some node in the list that can be reached again by continuously fol

Given the head of a linked list, remove the nth node from the end of the list and return its head. Example 1:Input: head = [1,2,3,4,5], n = 2Output: [1,2,3,5] Example 2:Input: head = [1

Given the head of a linked list, rotate the list to the right by k places. Example 1:Input: head = [1,2,3,4,5], k = 2Output: [4,5,1,2,3] Example 2:Input: head = [0,1,2], k = 4Outpu

A peak element is an element that is strictly greater than its neighbors. Given a 0-indexed integer array nums, find a peak element, and return its index. If the array contains multiple peaks, return

Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value. If target is not found in the array, return [-1, -1]. You must write an a

You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the ith line are (i, 0) and (i, height[i]). Find two lines that together with the x-a

Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. A subarray is a contiguous part of an array. Example 1:Input: n

Given an array of meeting time intervals intervals where intervals[i] = [starti, endi], return the minimum number of conference rooms required. Example 1:Input: intervals = [[0,30],[5,10],[1

Given an array of meeting time intervals where intervals[i] = [start, end], determine if a person could attend all meetings. Example 1:Input: intervals = [[0,30],[5,10],[15,20]]Output: false