【Leetcode刷题笔记】2.Add Two Numbers

You are given two non-empty linked lists representing two non-negative integers. 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.

You may assume the two numbers do not contain any leading zero, except the number 0 itself.

Example:

Input: (2 -> 4 -> 3) + (5 -> 6 -> 4)
Output: 7 -> 0 -> 8
Explanation: 342 + 465 = 807.

 

Analysis：

#0.define an Integer carry 

#1.calculate the total for one node

#2.assign to a new LinkNode

#3.finally check if we have new carry ， if yes ， create a new place to store it