题解 | #删除有序链表中重复的元素-I#

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 deleteDuplicates (ListNode head) {
        // write code here
        if (head == null) return head;
        ListNode prev = head;
        ListNode curr = head.next;
        while (prev!=null&&curr != null) {
            if (prev.val == curr.val) {
                prev.next = curr.next;
                curr=curr.next;
            }else{
                prev=prev.next;
                curr=curr.next;
            }
           
        }
        return head;
    }
}