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Solution: Return the Nth Node from End

Explore how to find the nth node from the end of a linked list. Understand two approaches using Python code: double iteration to calculate list length and direct traversal, and the two-pointer technique for efficient traversal. This lesson includes step-by-step algorithm explanations and complexity analysis to help you implement these solutions effectively in coding interviews.

Statement

Given the head of a linked list, return the nthn^{th} node from the end of the linked list.

Constraints:

  • The number of nodes in the list is kk.

  • 11 \leq kk 103 \leq 10^3

  • 103-10^3\le ...