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
代码如下：
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) { val = x; }
* }
*/
public class Solution {
public ListNode removeElements(ListNode head, int val) {
if(head==null)
return null; while(head.val==val&&head.next!=null)
head=head.next; if((head.next==null&&head.val==val))
return null; ListNode p=head; while(p.next!=null)
{
if(p.next.val==val)
p.next=p.next.next;
else p=p.next; }
return head;
}
}