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Grokking the Coding Interview Patterns in JavaScript

Solution: Intersection of Two Linked Lists

Explore how to detect the intersection point of two singly linked lists by using the two pointers method. Learn to align the traversal paths without calculating lengths explicitly, ensuring efficient detection of shared nodes while maintaining optimal time and space complexity.

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Statement

You are given the heads of two singly linked lists, headA and headB, to determine whether the two lists intersect. If they intersect, return the node where the intersection begins. Otherwise, return NULL.

Note: Linked lists intersect if they share a common node in memory, not just a node with the same value.

Constraints:

  • 1≤1 ≤ node.val ≤105≤ 10^5

  • The number of nodes of listAlistA is in the mm ...