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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

Credits:
Special thanks to  for adding this problem and creating all test cases.

/** * 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(null == head)			return head;		while(head.val == val){			head = head.next;			if(null == head)				return head;		}				ListNode tmp = head;		while(tmp.next !=null){			if(tmp.next.val ==val){				tmp.next = tmp.next.next;			}else{				tmp = tmp.next;			}					}		return head;    }}

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