203. Remove Linked List Elements

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