5/3 每日一題

 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.

class Solution:

    def addBinary(self, a: str, b: str) -> str:

        #先轉成10再轉成2

        #2進制轉10進制

        A=int(a,2) #輸出3,type:int

        B=int(b,2)  #輸出1,type:int

        c=bin(A+B)  #輸出type:str  ,輸出0b100  捨去前兩項(0b)

        return c[2:]