🌵83. Remove Duplicates from Sorted List
https://leetcode.com/problems/remove-duplicates-from-sorted-list/
js
/**
* Definition for singly-linked list.
* function ListNode(val) {
* this.val = val;
* this.next = null;
* }
*/
/**
* @param {ListNode} head
* @return {ListNode}
*/
var deleteDuplicates = function(head) {
if (!head) {
return head
}
var prev = head
var current = head.next
while (current) {
if (current.val !== prev.val) {
prev = prev.next = current
}
current = current.next
}
prev.next = null
return head
}py
# 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
"""
if not head:
return head
prev, current = head, head.next
while current:
if current.val != prev.val:
prev.next = current
prev = prev.next
current = current.next
prev.next = None
return head