public static ListNode removeElements(ListNode head, int val) {
while (head != null && head.val == val) head = head.next;
ListNode p = head;
while (head != null && head.next != null) {
while (head.next != null && head.next.val == val) {
head.next = head.next.next;
}
head = head.next;
}
return p;
}
public static void main(String a[]) {
ListNode node = new ListNode(1);
node.print();
node = removeElements(node, 1);
node.print();
}