Leetcode-Remove Duplicates from Sorted List

Remove Duplicates from Sorted List

从排序链表中删除重复元素。
Description

解题思路
依次比较相邻的两个链表元素,若值相等,则将前一个节点的next引用为后一个节点的后一个节点。使用cur来依次向下遍历元素,最后返回head。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
# Definition for singly-linked list.
# class ListNode(object):
# def __init__(self, x):
# self.val = x
# self.next = None

class Solution(object):
def deleteDuplicates(self, head):
"""
:type head: ListNode
:rtype: ListNode
"""
cur = head

while cur:
while cur.next and cur.next.val==cur.val:
cur.next = cur.next.next
cur = cur.next
return head