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
Nth node from end of linked list
Easy Accuracy: 46.6% Submissions: 100k+ Points: 2

Given a linked list consisting of L nodes and given a number N. The task is to find the Nth node from the end of the linked list.

Example 1:

Input:
N = 2
LinkedList: 1->2->3->4->5->6->7->8->9
Output: 8
Explanation: In the first example, there
are 9 nodes in linked list and we need
to find 2nd node from end. 2nd node
from end os 8.  

Example 2:

Input:
N = 5
LinkedList: 10->5->100->5
Output: -1
Explanation: In the second example, there
are 4 nodes in the linked list and we
need to find 5th from the end. Since 'n'
is more than the number of nodes in the
linked list, the output is -1.

Your Task:
The task is to complete the function getNthFromLast() which takes two arguments: reference to head and N and you need to return Nth from the end or -1 in case node doesn't exist..

Note:
Try to solve in single traversal.

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

Constraints:
1 <= L <= 106
1 <= N <= 106

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.

Nth node from end of linked list

Output Window