左右指针,平民解法,欢迎指正。 /** * Definition for singly-linked list. * class ListNode { * int val; * ListNode next; * ListNode(int x) { * val = x; * next = null; * } * } */ public class Solution { public void reorderList(ListNode head) { /* 1L-2-3-4-5-6R 1L 6R-2-3-4-5 1 6R 2L 3 4 5 1 6 2L 3 4 5R 1 6 2L 5R 3 4 1...