67 Add Binary

1. Description

Given two binary string a and b, return their sums as a binary string.

 

constraints :

• 1 <= a.length, b.length <= 104
• a and b consist only of '0' or '1' characters.
• Each string does not contain leading zeros except for the zero itself.

2. Algorithms

Python's built-in function int() can change input string into number system what we want. And also, built-in function format() can change int into string number system what we want.

3. Codes

class Solution:
    def addBinary(self, a: str, b: str) -> str:
        return format(int(a, 2) + int(b, 2), 'b')

4. Conclusion