LeetCode刷题（45）--Remove Duplicates from Sorted List

一个遍历列表，一个记录结果，一个记录head！

class Solution(object):    def deleteDuplicates(self, head):        """        :type head: ListNode        :rtype: ListNode        """        if not head:            return head        cur = head        dummy = head        res = dummy        while cur.next:            if cur.next.val != cur.val:                dummy.next = cur.next                dummy = dummy.next            cur = cur.next        dummy.next = None        return res