Happy Number
A happy number is a number defined by the following process: Starting with any positive integer, replace the number by…
Linked List Cycle II
Given a linked list, determine if it contains a cycle. If a cycle is present, find the node where the…
Linked List Cycle
Given a linked list, determine if it has a cycle in it. A cycle is when a node in the…
Reverse Nodes in k-Group
Given the head of a singly linked list and an integer k, reverse the nodes...
Reverse Linked List II
Given the head of a singly linked list and two integers left and right, reverse...
Rotate List
Given the head of a singly linked list and an integer k, rotate the linked list to the right by…
Reverse Linked List
Given the head of a singly linked list, reverse the list in-place and return the new head of the reversed…
Meeting Scheduler
You are given the availability of two people's schedules, represented as lists of intervals [start, end]. Each interval represents the…
Meeting Rooms II
Given a list of meeting intervals, represented as pairs of integers [start, end], where start denotes the start time of…
Meeting Rooms
Given a list of meeting intervals, represented as pairs of integers [start, end], where start denotes the start time of…