递归返回时需要记录一下返回到倒数第几个节点了 /* public class ListNode { int val; ListNode next = null; ListNode(int val) { this.val = val; } }*/ public class Solution { int n = 0; int i = -1; public ListNode FindKthToTail(ListNode head,int k) { i ++; if(head == null) {...