Remove Nth Node from the Back of the Linked List | Linked List | Coding Interview

I can think of two ways to solve this problem; one using a stack and another without a stack. The time complexity will be the same in both cases, and the space requirement is linear in the stack approach and constant in the iterative one. Let’s see how.

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Table of Contents

1. Description
2. Iterative solution
3. Code and Complexities
4. Stack-based solution (in short)

Description

Given a linked list with a pointer to its head and an integer n. Delete the nth node from the back of the linked list.

Suppose we have a linked list with the following nodes, and we want to delete the 9th from behind, which is holding “F.”