【LeetCode】537. Complex Number Multiplication【M】

Given two strings representing two complex numbers.

You need to return a string representing their multiplication. Note i2 = -1 according to the definition.

Example 1:

Input: "1+1i", "1+1i"Output: "0+2i"Explanation: (1 + i) * (1 + i) = 1 + i2 + 2 * i = 2i, and you need convert it to the form of 0+2i.

Example 2:

Input: "1+-1i", "1+-1i"Output: "0+-2i"Explanation: (1 - i) * (1 - i) = 1 + i2 - 2 * i = -2i, and you need convert it to the form of 0+-2i.

Note:

1. The input strings will not have extra blank.
2. The input strings will be given in the form of a+bi, where the integer a and b will both belong to the range of [-100, 100]. And the output should be also in this form.

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这道题简单得没啥可说的啊

class Solution(object):    def complexNumberMultiply(self, a, b):        def get_num(s):            s = s.split('+')            s1 = int(s[0])            s2 = int(s[1][:-1])            return s1,s2        a1,a2 = get_num(a)        b1,b2 = get_num(b)        res1 = a1*b1 - a2*b2        res2 = a1*b2 + a2*b1        return str(res1) + '+' + str(res2) + 'i'        """        :type a: str        :type b: str        :rtype: str        """