[leetcode]Remove Duplicates from Sorted List @ Python

原题地址：https://oj.leetcode.com/problems/remove-duplicates-from-sorted-list/

题意：

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.

解题思路：链表节点的去重。比较简单。

代码：

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

class Solution:
    # @param head, a ListNode
    # @return a ListNode
    def deleteDuplicates(self, head):
        if head == None or head.next == None:
            return head
        p = head
        while p.next:
            if p.val == p.next.val:
                p.next = p.next.next
            else:
                p = p.next
        return head