题解 | 牛群排列去重

# class ListNode:
#     def __init__(self, x):
#         self.val = x
#         self.next = None
#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param head ListNode类 
# @return ListNode类
#
class Solution:
    def deleteDuplicates(self , head: ListNode) -> ListNode:
        # write code here
        cur = head
        while cur:
            Next = cur.next
            if Next:
                if Next.val == cur.val:
                    cur.next = Next.next
                    Next = Next
                else:
                    cur = cur.next 
                    Next = Next.next
            else:
                break


        return head