67. Add Binary

Problem Statement

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

Example 1:

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

Example 2:

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

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.

Solution:

Python

py

class Solution:
    def addBinary(self, a: str, b: str) -> str:
        sum = bin(int(a, 2) + int(b, 2))
        return sum[2:]  # remove 0b

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