Check if two linked lists merge. If so, where?

Question

This question may be old, but I couldn\'t think of an answer.

Say, there are two lists of different lengths, merging at a point; how do we know wher

Answer 1

You can use a set of Nodes. Iterate through one list and add each Node to the set. Then iterate through the second list and for every iteration, check if the Node exists in the set. If it does, you've found your merge point :)