#Cycle Detection

How do you detect a cycle in a linked list using Floyd's Algorithm?

Given a linked list with a cycle, write a method to find and return the node at which the cycle begins. Discuss the logic behind your approach, including any flowchart or diagram if necessary.

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.