[Algorithm] Leetcode Add Two Numbers

Leetcode Two Sum https://leetcode.com/problems/add-two-numbers/ 1. 나의 풀이 /** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode() {} * ListNode(int val) { this.val = val; } * ListNode(int val, ListNode next) { this.val = val; this.next = next; } * } */ class Solution { public ListNode addTwoNumbers(ListNode l1, ListNode l2) { int sum = l1.val + l2.val; ListNode rtn = new ListNo...