83. Remove Duplicates from Sorted List

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

# 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
        """

        temp = head
        while temp:
            while(temp.next and temp.val == temp.next.val):
                temp.next = temp.next.next
            temp = temp.next
        return head