LeetCode 203

Remove Linked List Elements

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

 

 1 /**
 2  * Definition for singly-linked list.
 3  * public class ListNode {
 4  *     int val;
 5  *     ListNode next;
 6  *     ListNode(int x) { val = x; }
 7  * }
 8  */
 9 public class Solution {
10     public ListNode removeElements(ListNode head, int val) {
11         
12         ListNode fakehead = new ListNode(-1);
13         fakehead.next = head;
14         ListNode n = fakehead;
15         
16         if(head == null){
17             return head;
18         }
19         while(n.next != null){
20             if(n.next.val == val){
21                 n.next = n.next.next;
22             }else{
23                 n = n.next;
24             }
25         }
26         return fakehead.next;
27     }
28 }

 

posted @ 2016-04-24 23:11  Juntaran  阅读(150)  评论(0)  编辑  收藏  举报