x
×
Timer is Running


Reverse a linked list
Submissions: 98017   Accuracy:

48.93%

  Difficulty: Easy   Marks: 2
Associated Course(s):   Sudo Placement   Sudo Placement [IITs] More
Show Topic Tags    
Company Tags Accolite  Adobe  Amazon  Cisco  Cognizant   D-E-Shaw  Goldman Sachs  IgniteWorld   Intuit   Mahindra Comviva  MakeMyTrip  Microsoft  Paytm  Qualcomm  Samsung  SAP Labs  Snapdeal   Tejas Network  Teradata  VMWare  Walmart  Zoho 

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

Example 1:

Input:
N = 6
value[] = {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:
N = 5
value[] = {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

 

** For More Input/Output Examples Use 'Expected Output' option **

Contributor: Amit Khandelwal, Harshit Sidhwa
Author: support3


If you have purchased any course from GeeksforGeeks then please ask your doubt on course discussion forum. You will get quick replies from GFG Moderators there.



Need help with your code? Please use ide.geeksforgeeks.org, generate link and share the link here.


to report an issue on this page.