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N-th Element of a Linked List

Problem Description

Implement a function that finds the nth node in a linked list, counting from the end. Your function should take a linked list (its head element) and n, a positive integer as its arguments. If the given n is larger than the number of nodes in the list, return null.

Solution

I've written an implementation that determines the solution in O(n) time complexity (worst case).

• JavaScript
  • Solution
  • JS Test File
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