leetcode67. 二进制求和 🌟

1 class Solution:
2     def addBinary(self, a: str, b: str) -> str:
3         return bin(int(a, 2) + int(b, 2))[2:]

 1 class Solution:
 2     """
 3         作者：QQqun902025048
 4         链接：https://leetcode-cn.com/problems/two-sum/solution/python-1xing-nei-zhi-han-shu-fei-nei-zhi-jie-fa-by/
 5     """
 6     def addBinary(self, a: str, b: str) -> str:
 7         r, p = ‘‘, 0
 8         d = len(b) - len(a)
 9         a = ‘0‘ * d + a
10         b = ‘0‘ * -d + b   # ‘0‘ * -d = ‘‘
11         for i, j in zip(a[::-1], b[::-1]):
12             s = int(i) + int(j) + p
13             r = str(s % 2) + r
14             p = s // 2
15         return ‘1‘ + r if p else r

 1 class Solution:
 2     def addBinary(self, a: str, b: str) -> str:
 3         _sum = ‘‘
 4         c = 0
 5         d = len(a) - len(b)
 6         a = ‘0‘ * -d + a
 7         b = ‘0‘ * d + b
 8         for i in range(len(a) - 1, -1, -1):
 9             s = int(a[i]) + int(b[i]) + c
10             if s == 2:
11                 s = 0
12                 c = 1
13             elif s == 3:
14                 s = 1
15                 c = 1
16             else:
17                 c = 0
18             _sum = str(s) + _sum
19         
20         if c == 1:
21             _sum = ‘1‘ + _sum
22         return _sum