42. Trapping Rain Water

Description

Given two binary strings, return their sum (also a binary string).

The input strings are both non-empty and contains only characters 1 or 0.

Example 1:

Input: a = "11", b = "1"
Output: "100"

Example 2:

Input: a = "1010", b = "1011"
Output: "10101"

Tags: Math, String

题意

给你两个二进制串,求其和的二进制串。

题解

思路1

按照小学算数那么来做,用 carry 表示进位,从后往前算,依次往前,每算出一位就插入到最前面即可,直到把两个二进制串都遍历完即可。



思路2

思路2 ```go

```

结语

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