package normal;

/**
 * @program JavaBooks
 * @description: 链表
 * @author: mf
 * @create: 2019/10/17 01:03
 */

public class ListNode {
    int val;
    ListNode next;

    public ListNode(int val) {
        this.val = val;
    }

    public static ListNode setListNode(int[] arr) {
        ListNode node = new ListNode(-1);
        ListNode p1 =