[LeetCode]题解（python）：083 - Remove Duplicates from Sorted List

题目来源

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https://leetcode.com/problems/remove-duplicates-from-sorted-list/

Given a sorted linked list, delete all duplicates such that each element appear only once.

For example,
Given 1->1->2, return 1->2.
Given 1->1->2->3->3, return 1->2->3.

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题意分析

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Input:

:type head: ListNode

Output:

:rtype: ListNode

Conditions:一个有序list，删除掉重复的元素

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题目思路

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每次判断增加一个节点时，看是否与当前结点重复，重复则跳过

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AC代码（Python）

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

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