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 dummy = new ListNode(0); ListNode node = dummy; node.next = head; while(node != null && node.next != null) { if(node.next.val == val) { node.next = node.next.next; } else { node = node.next; } } return dummy.next; }