给定两个二进制字符串,返回他们的和(用二进制表示)。 输入为非空字符串且只包含数字 1 和 0。 示例 1: 输入: a = "11", b = "1" 输出: "100" 示例 2: 输入: a = "1010", b = "1011" 输出: "10101"
'''
给定两个二进制字符串,返回他们的和(用二进制表示)。
输入为非空字符串且只包含数字 1 和 0。
示例 1:
输入: a = "11", b = "1"
输出: "100"
示例 2:
输入: a = "1010", b = "1011"
输出: "10101"
'''
class Solution:
def addBinary(self, a, b):
"""
:type a: str
:type b: str
:rtype: str
"""
#return bin(int(a,2)+int(b,2))[2:]
la, lb = len(a), len(b)
i, j = la - 1, lb - 1
cin = 0
result = ''
while (i >= 0) and (j >= 0):
tmp = (cin + int(a[i]) + int(b[j])) % 2
cin = (cin + int(a[i]) + int(b[j])) // 2
result = str(tmp) + result
i -= 1
j -= 1
if i < 0 and j >= 0:
while j >= 0:
tmp = (cin + int(b[j])) % 2
cin = (cin + int(b[j])) // 2
result = str(tmp) + result
j -= 1
elif i >= 0 and j < 0:
while i >= 0:
tmp = (cin + int(a[i])) % 2
cin = (cin + int(a[i])) // 2
result = str(tmp) + result
i -= 1
if cin == 1:
result = '1' + result
return result
object=Solution()
result=object.addBinary('101010','11101')
print(result)
GitHub源码:
https://github.com/tyutltf/Leecode