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
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