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"content": "<p>You are given two <strong>non-empty</strong> linked lists representing two non-negative integers. The digits are stored in <strong>reverse order</strong>, and each of their nodes contains a single digit. Add the two numbers and return the sum as a linked list.</p>\n\n<p>You may assume the two numbers do not contain any leading zero, except the number 0 itself.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/10/02/addtwonumber1.jpg\" style=\"width: 483px; height: 342px;\" />\n<pre>\n<strong>Input:</strong> l1 = [2,4,3], l2 = [5,6,4]\n<strong>Output:</strong> [7,0,8]\n<strong>Explanation:</strong> 342 + 465 = 807.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> l1 = [0], l2 = [0]\n<strong>Output:</strong> [0]\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> l1 = [9,9,9,9,9,9,9], l2 = [9,9,9,9]\n<strong>Output:</strong> [8,9,9,9,0,0,0,1]\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li>The number of nodes in each linked list is in the range <code>[1, 100]</code>.</li>\n\t<li><code>0 <= Node.val <= 9</code></li>\n\t<li>It is guaranteed that the list represents a number that does not have leading zeros.</li>\n</ul>\n",
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"code": "/**\n * Definition for singly-linked list.\n * function ListNode(val, next) {\n * this.val = (val===undefined ? 0 : val)\n * this.next = (next===undefined ? null : next)\n * }\n */\n/**\n * @param {ListNode} l1\n * @param {ListNode} l2\n * @return {ListNode}\n */\nvar addTwoNumbers = function(l1, l2) {\n \n};",
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"code": "/**\n * Definition for singly-linked list.\n * class ListNode {\n * val: number\n * next: ListNode | null\n * constructor(val?: number, next?: ListNode | null) {\n * this.val = (val===undefined ? 0 : val)\n * this.next = (next===undefined ? null : next)\n * }\n * }\n */\n\nfunction addTwoNumbers(l1: ListNode | null, l2: ListNode | null): ListNode | null {\n \n};",
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"lang": "Kotlin",
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"code": "/**\n * Definition for singly-linked list.\n * class ListNode {\n * int val;\n * ListNode? next;\n * ListNode([this.val = 0, this.next]);\n * }\n */\nclass Solution {\n ListNode? addTwoNumbers(ListNode? l1, ListNode? l2) {\n \n }\n}",
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"lang": "Go",
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"code": "/**\n * Definition for singly-linked list.\n * type ListNode struct {\n * Val int\n * Next *ListNode\n * }\n */\nfunc addTwoNumbers(l1 *ListNode, l2 *ListNode) *ListNode {\n \n}",
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"code": "# Definition for singly-linked list.\n# class ListNode\n# attr_accessor :val, :next\n# def initialize(val = 0, _next = nil)\n# @val = val\n# @next = _next\n# end\n# end\n# @param {ListNode} l1\n# @param {ListNode} l2\n# @return {ListNode}\ndef add_two_numbers(l1, l2)\n \nend",
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"code": "// Definition for singly-linked list.\n// #[derive(PartialEq, Eq, Clone, Debug)]\n// pub struct ListNode {\n// pub val: i32,\n// pub next: Option<Box<ListNode>>\n// }\n// \n// impl ListNode {\n// #[inline]\n// fn new(val: i32) -> Self {\n// ListNode {\n// next: None,\n// val\n// }\n// }\n// }\nimpl Solution {\n pub fn add_two_numbers(l1: Option<Box<ListNode>>, l2: Option<Box<ListNode>>) -> Option<Box<ListNode>> {\n \n }\n}",
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