/*
 * @lc app=leetcode.cn id=160 lang=java
 *
 * [160] 相交链表
 */

// @lc code=start
/**
 * Definition for singly-linked list.
 * public class ListNode {
 * int val;
 * ListNode next;
 * ListNode(int x) {
 * val = x;
 * next = null;
 * }
 * }
 */
class GetIntersectionNode {
  public ListNode getIntersectionNode(ListNode headA, ListNode headB) {
    ListNode l1 = headA, l2 = headB;
    while (l1 != l2) {
      l1 = l1 == null ? headB : l1.next;
      l2 = l2 == null ? headA : l2.next;
    }
    return l1;
  }
}
// @lc code=end