LeetCode Problem 83-Remove Duplicates from Sorted List

删除排序链表中的重复元素。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:

1 2	输入: 1->1->2 输出: 1->2

示例 2:

1 2	输入: 1->1->2->3->3 输出: 1->2->3

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# Definition for singly-linked list. # class ListNode: # def __init__(self, x): # self.val = x # self.next = None

思路一

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class Solution: def deleteDuplicates(self, head: ListNode) -> ListNode: dummy = tail = ListNode(0) dummy.next = p = head while p: while p.next and p.next.val == p.val: p = p.next tail.next = p tail = tail.next p = p.next return dummy.next

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