import{ListNode}from"../reverse-linked-list/ListNode.ts"; exportdefaultfunctiondeleteDuplicates( head:ListNode|null,):ListNode|null{if(!head)return head; const result =newListNode(head.val);let current = result;while(head){if(head.val!== current.val){ current.next=newListNode(head.val); current = current.next;} head = head.next;} return result;}