LeetCode Easy:83. Remove Duplicates from Sorted List

一、题目

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.

要求是删去有序链表中重复的元素。

二、此题比较简单，设置一个游标遍历链表，只要比较游标的当前和next.value是否相同，相同的话就跳过，让当前游标指向next.next

三、代码

# 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
        """
        p = head
        while p!= None:
            while p.next != None and p.val == p.next.val:
                p.next = p.next.next
            p = p.next
        return head