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Grokking the Coding Interview Patterns in Go

Solution: Intersection of Two Linked Lists

Explore how to identify the intersection of two singly linked lists by employing a two pointer approach. This lesson helps you understand a method to align pointers without calculating list lengths, ensuring efficient traversal and detection of intersection nodes with constant space usage.

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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 ...