Questions¶
Difficulty: Easy
Remove all elements from a linked list of integers that have value val.
Example
Given: 1 --> 2 --> 6 --> 3 --> 4 --> 5 --> 6, val = 6
Return: 1 --> 2 --> 3 --> 4 --> 5
Coding¶
python¶
# -*- coding: utf-8 -*-
# Definition for singly-linked list.
# class ListNode(object):
# def __init__(self, x):
# self.val = x
# self.next = None
class Solution(object):
def removeElements(self, head, val):
"""
:type head: ListNode
:type val: int
:rtype: ListNode
"""
if head is None:
return head
while head.val == val:
head = head.next
if head == None:
return head
p = head
while p.next != None:
if p.next.val == val:
p.next = p.next.next
else:
p = p.next
if p.val == val:
p = p.next
return head