题目链接

83. 删除排序链表中的重复元素 - 力扣（LeetCode）

解题代码

# Definition for singly-linked list.
# class ListNode:
#     def __init__(self, val=0, next=None):
#         self.val = val
#         self.next = next
class Solution:def deleteDuplicates(self, head: Optional[ListNode]) -> Optional[ListNode]:current = headwhile current and current.next:if current.val == current.next.val:current.next = current.next.nextelse: current=current.nextreturn head