537. Complex Number Multiplication

Posted 2020-10-21 swallowblank

题目大意：

　　　　给出a， b两个用字符串表示的虚数，求a*b

 

题目思路：

　　　　偷了个懒，Python3的正则表达式匹配了一下，当然acm里肯定是不行的

 

 1 class Solution:
 2     def complexNumberMultiply(self, a, b):
 3         """
 4         :type a: str
 5         :type b: str
 6         :rtype: str
 7         """
 8         match = re.search(r\'([+-]*\\d+)[+-]([+-]*\\d+)i$\', a)
 9         x1 = int(match.group(1))
10         y1 = int(match.group(2))
11         match = re.search(r\'([+-]*\\d+)[+-]([+-]*\\d+)i$\', b)
12         x2 = int(match.group(1))
13         y2 = int(match.group(2))
14         ans = \'\'
15         ans = ans + str(x1*x2 - y1*y2) + \'+\'
16         ans = ans + str(x1*y2 + x2*y1) + \'i\'
17         return ans
18