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import { ArrayToListNode } from "../reverse-linked-list/ArrayToListNode.ts";import { ListNode } from "../reverse-linked-list/ListNode.ts";import { ListNodeIterator } from "./ListNodeIterator.ts";
export default function mergeNodes(head: ListNode | null): ListNode | null {    const result: number[] = [];    let sum = 0;    for (const num of ListNodeIterator(head)) {        if (num === 0) {            if (sum > 0) {                result.push(sum);            }            sum = 0;        } else {            sum += num;        }    }    return ArrayToListNode(result);}