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Given two numbers represented as strings, return multiplication of the numbers as a string.
Note: The numbers can be arbitrarily large and are non-negative.
这道题可花了时间，还是对位置有点控制不好。
public class Solution {
public String multiply(String num1, String num2) {
String[] resultStr = new String[num2. ...
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
看了半天没搞清楚题目意思 ...