Copied to Clipboard
Check If Circular Linked List
Basic Accuracy: 50.74% Submissions: 79958 Points: 1

Given head, the head of a singly linked list, find if the linked list is circular or not. A linked list is called circular if it not NULL terminated and all nodes are connected in the form of a cycle. An empty linked list is considered as circular.

Note: The linked list does not contains any inner loop.

Example 1:

LinkedList: 1->2->3->4->5
(the first and last node is connected,
i.e. 5 --> 1)
Output: 1

Example 2:

LinkedList: 2->4->6->7->5->1
Output: 0

Your Task:
The task is to complete the function isCircular() which checks if the given linked list is circular or not. It should return true or false accordingly. (the driver code prints 1 if the returned values is true, otherwise 0)

Expected Time Complexity: O(N).
Expected Auxiliary Space: O(1).

1 <=Number of nodes<= 100

We are replacing the old Disqus forum with the new Discussions section given below.
Click here to view old Disqus comments.

to report an issue on this page.


We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?


All Submissions

My Submissions:

Login to access your submissions.

Check If Circular Linked List

Output Window