/* leetcode 2 给你两个 非空 的链表,表示两个非负的整数。它们每位数字都是按照 逆序 的方式存储的,并且每个节点只能存储 一位 数字。 请你将两个数相加,并以相同形式返回一个表示和的链表。 你可以假设除了数字 0 之外,这两个数都不会以 0 开头。 输入:l1 = [2,4,3], l2 = [5,6,4] 输出:[7,0,8] 解释:342 + 465 = 807. 示例 2: 输入:l1 = [0], l2 = [0] 输出:[0] 示例 3: 输入:l1 = [9,9,9,9,9,9,9], l2 = [9,9,9,9] 输出:[8,9,9,9,0,0,0,1] 解释:也就是用列表表示 */ function addTwoNumbers(l1, l2) { const head = new ListNode() let curNode = head let carry = 0 while (l1!==null || l2!==null) { let x = l1 !== null ? l1.val : 0 let y = l2 !== null ? l2.val : 0 let sum = x + y + carry curNode.val = sum % 10 carry = Math.floor(sum/10) if(l1!==null) l1=l1.next if(l2!==null) l2=l2.next if(carry > 0 || l1 !=null || l2 != null){ curNode.next = new ListNode() curNode = curNode.next } } if(carry!==0) { curNode.val = carry } return head } function addTwoNumbers2(l1, l2){ const task1 = [] const task2 = [] while(l1 || l2) { if(l1){ task1.push(l1.val) l1 = l1.next } if(l2){ task2.push(l2.val) l2 = l2.next } } let target = BigInt(task1.reverse().join('')) + BigInt(task2.reverse().join('')) // console.log(Number(task1.reverse().join(''))); console.log(target); const head = new ListNode() let cur = head while (target) { cur.val = target % 10n target = target / 10n cur.next = target ? new ListNode() : null cur = cur.next } return head } // 换一种思路,我们按照顺序压入栈中,再依次弹出,之后生成对应的数,最后再把这个数转化为链表不就行了吗? // 输入:l1 = [9,9,9,9,9,9,9], l2 = [9,9,9,9] // 输出:[8,9,9,9,0,0,0,1] import {LinkList, LinkListNode as ListNode} from '../../list/index.js' const l1 = LinkList.fromArray([1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1]).head const l2 = LinkList.fromArray([5,6,4]).head // console.log(LinkList.prototype.toString.apply(addTwoNumbers(l1,l2))); console.log(LinkList.prototype.toString.apply(addTwoNumbers2(l1,l2)));