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import { ListNode } from "../reverse-linked-list/ListNode.ts";
function addTwoNumbers(    l1: ListNode | null,    l2: ListNode | null,): ListNode | null {    if (!l1) {        return l2;    }    if (!l2) {        return l1;    }
    const head = new ListNode(0);    let temp: ListNode | null = head;    let p1: ListNode | null = l1;    let p2: ListNode | null = l2;    let carry = 0;    while (p1 || p2 || carry) {        if (p1) {            carry += p1.val;            p1 = p1.next;        }        if (p2) {            carry += p2.val;            p2 = p2.next;        }        temp.next = new ListNode(carry % 10);        temp = temp.next;        carry = Math.floor(carry / 10);    }    return head.next;}export default addTwoNumbers;