题目描述:
LeetCode 537. Complex Number Multiplication
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:
- The input strings will not have extra blank.
- 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.
题目大意:
求两复数相乘的结果
注意:
- 输入字符串不包含额外空格
- 输入字符串以a+bi给出,其中a与b都是[-100, 100]范围的整数。输出采用同样形式
解题思路:
字符串处理
Python代码:
class Solution(object):
def complexNumberMultiply(self, a, b):
"""
:type a: str
:type b: str
:rtype: str
"""
extract = lambda s : map(int, s[:-1].split('+'))
m, n = extract(a)
p, q = extract(b)
return '%s+%si' % (m * p - n * q, m * q + n * p)
本文链接:http://bookshadow.com/weblog/2017/03/26/leetcode-complex-number-multiplication/
请尊重作者的劳动成果,转载请注明出处!书影博客保留对文章的所有权利。