#Linked List

Write a function to determine if a linked list has a cycle in it. If there is a cycle, return the node where the cycle begins. Discuss the approach and the time complexity of your solution.

Given a linked list, remove the Nth node from the end of the list. The solution should maintain a linear time complexity and constant space complexity. Provide the implementation details and discuss edge cases.

Explain how to flatten a linked list, which is a list of linked lists, into a single linked list. Discuss your approach, challenges faced, and how you would implement this in your code.

Explain your approach to solving problems related to linked lists. What are the common operations you can perform on a linked list and their time complexities?

Implement an algorithm to detect a cycle in a linked list. You can use Floyd’s Tortoise and Hare algorithm for this purpose. If a cycle exists, return true; otherwise, return false.