83. 删除排序链表中的重复元素

83. 删除排序链表中的重复元素

难度简单 480

给定一个排序链表，删除所有重复的元素，使得每个元素只出现一次。

示例  1:

输入: 1->1->2

输出: 1->2

示例  2:

输入: 1->1->2->3->3

输出: 1->2->3.

/**
 * 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 deleteDuplicates(ListNode head) {
        ListNode current = head;
        while (current != null && current.next != null) {
            if (current.next.val == current.val) {
                current.next = current.next.next;
            } else {
                current = current.next;
            }
        }
        return head;
// 作者：LeetCode
// 链接：https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list/solution/shan-chu-pai-xu-lian-biao-zhong-de-zhong-fu-yuan-s/
    }
}