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 <= 104aandbconsist only of'0'or'1'characters.- Each string does not contain leading zeros except for the zero itself.
class Solution:
def addBinary(self, a: str, b: str) -> str:
b1 = int(a, 2)
b2 = int(b, 2)
r = b1+b2
return bin(r)[2:]