CODE 126: Add Two Numbers

You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list.

Input: (2 -> 4 -> 3) + (5 -> 6 -> 4)

Output: 7 -> 0 -> 8

public ListNode addTwoNumbers(ListNode l1, ListNode l2) {// Start typing your Java solution below// DO NOT write main() functionListNode cpyl1 = l1;ListNode cpyl2 = l2;int c = 0;while (null != cpyl1 && null != cpyl2) {int tmp = cpyl1.val + cpyl2.val + c;if (tmp > 9) {c = tmp / 10;}cpyl1.val = tmp % 10;cpyl1 = cpyl1.next;cpyl2 = cpyl2.next;}while (cpyl1 != null) {int tmp = cpyl1.val + c;if (tmp > 9) {c = tmp / 10;}cpyl1.val = tmp % 10;cpyl1 = cpyl1.next;}cpyl1 = l1;while (null != cpyl1.next) {cpyl1 = cpyl1.next;}while (cpyl2 != null) {int tmp = cpyl2.val + c;if (tmp > 9) {c = tmp / 10;}cpyl1.next = new ListNode(tmp % 10);cpyl1 = cpyl1.next;cpyl2 = cpyl2.next;}if (c != 0) {cpyl1.next = new ListNode(c);}return l1;}