LeetCode 83 删除排序链表中的重复元素 ---python

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_40155090/article/details/83830060

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.
# class ListNode:
#     def __init__(self, x):
#         self.val = x
#         self.next = None

class Solution:
    def deleteDuplicates(self, head):
        """
        :type head: ListNode
        :rtype: ListNode
        """
        l = ListNode(None)
        l.next = head
        p = l
        while p.next:
            if p.val == p.next.val:
                p.next = p.next.next
            else:
                p = p.next
        return l.next