链表 | LeetCode 876. 链表的中间结点
876. 链表的中间结点 - 力扣(LeetCode) (leetcode-cn.com)https://leetcode-cn.com/problems/middle-of-the-linked-list/
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode() {}
* ListNode(int val) { this.val = val; }
* ListNode(int val, ListNode next) { this.val = val; this.next = next; }
* }
*/
class Solution {
public ListNode middleNode(ListNode head) {
ListNode cur = head, pre = head;
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