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

public ListNode removeElements(ListNode head, int val) {
ListNode cur = new ListNode(-1);
cur.next = head;
ListNode tmp = cur;
while (cur.next != null) {
if (cur.next.val == val) cur.next = cur.next.next;
else cur = cur.next;
}
return tmp.next;
}