How to determine whether a linked list contains a loop?

Posted by ET on Stack Overflow See other posts from Stack Overflow or by ET
Published on 2010-06-08T22:13:42Z Indexed on 2010/06/08 22:22 UTC
Read the original article Hit count: 174

Filed under:

linked-list

During a preparation for a job interview, I encountered the following question:

How can you determine whether a linked list (of any type) contains a loop, using additional space complexity of O(1)? You cannot assume that the loop starts at the first node (and of course, the loop doesn't have to contain all nodes).

I couldn't find the answer, though I have the feeling it's quite simple...

Related posts about linked-list

how to copy one linked list contents to another linked list

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I have been given list L1, L2. L1 contains 1,2,3 and L2 contains 4,5,6. how do i copy the contents from L2 to the end of L1 so in the end L1 contains 1,2,3,4,5,6. any suggestions? >>> More
Linked list and doubly linked list examples

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm looking for a good understandable example in c++ with differences. Does the header file <list.h> provide both or should I look somewhere else? >>> More
Replace LinkedList element value through LinkedList.Enumerator

as seen on Stack Overflow - Search for 'Stack Overflow'
I realize there are no way for me to replace value through LinkedList.Enumerator. For instead, I try to port the below Java code to C# // Java ListIterator<Double> itr1 = linkedList1.listIterator(); ListIterator<Double> itr2 = linkedList2.listIterator(); … >>> More
Handwritten linked list is segfaulting and I don't understand why

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi I was working on a bit of fun, making an interface to run gnuplot from within c++, and for some reason the my linked list implementation fails. The code below fails on the line plots-append(&plot). Stepping through the code I discovered that for some reason the destructor ~John() is called immediately… >>> More
removeFirst and addLast methods of LinkedList Class are Unknown

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a problem with my code in C# . if i click in compiler button , I get the following errors 'System.Collections.Generic.LinkedList<int?>' does not contain a definition for 'removeFirst' and no extension method 'removeFirst' accepting a first argument of type 'System.Collections… >>> More

Developer IT

How to determine whether a linked list contains a loop? - Developer IT

How to determine whether a linked list contains a loop?

linked-list

Related posts about linked-list

how to copy one linked list contents to another linked list

Linked list and doubly linked list examples

Replace LinkedList element value through LinkedList.Enumerator

Handwritten linked list is segfaulting and I don't understand why

removeFirst and addLast methods of LinkedList Class are Unknown

Categories cloud