▲
×
Back To Explore Page



Loading...

Leaderboard
Showing:
Handle Score
@Ibrahim Nash 6560
@blackshadows 6400
@mb1973 5777
@Quandray 5271
@akhayrutdinov 5111
@saiujwal13083 5074
@kirtidee18 4356
@sanjay05 3762
@mantu_singh 3638
@gfgaccount 3601
@marius_valentin_dragoi 3525
Complete Leaderboard
Reverse a linked list
Easy Accuracy: 48.93% Submissions: 100k+ Points: 2

Given a linked list of N nodes. The task is to reverse this list.

Example 1:

Input:
LinkedList: 1->2->3->4->5->6
Output: 6 5 4 3 2 1
Explanation: After reversing the list, 
elements are 6->5->4->3->2->1.

Example 2:

Input:
LinkedList: 2->7->8->9->10
Output: 10 9 8 7 2
Explanation: After reversing the list,
elements are 10->9->8->7->2.

Your Task:
The task is to complete the function reverseList() with head reference as the only argument and should return new head after reversing the list.

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

Constraints:
1 <= N <= 104

 

to report an issue on this page.

Editorial

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

Yes

All Submissions

My Submissions:

Login to access your submissions.

Reverse a linked list

Output Window