题解 | #删除链表峰值#

import java.util.*;

/*
 * public class ListNode {
 *   int val;
 *   ListNode next = null;
 *   public ListNode(int val) {
 *     this.val = val;
 *   }
 * }
 */

public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param head ListNode类 
     * @return ListNode类
     */
    public ListNode deleteNodes (ListNode head) {
        // write code here
        if(head==null||head.next==null||head.next.next==null){
            return head;
        }
        // ListNode dummy = new ListNode(-1);
        // dummy.next = head;
        ListNode left = head;
        ListNode cur = left.next;
        ListNode right = cur.next;
        while(right!=null){
            if(cur.val>left.val&&cur.val>right.val){
                left.next = right;
                cur = left.next;
                right = cur.next;
            }else{
                left = left.next;
                cur = cur.next;
                right = right.next;
            }
        }
        return head;
    }
}