g0501_0600.s0537_complex_number_multiplication

Class Solution

java.lang.Object

g0501_0600.s0537_complex_number_multiplication.Solution

public class Solution
extends Object

537 - Complex Number Multiplication.

Medium

A complex number can be represented as a string on the form "**real**+**imaginary**i" where:

• real is the real part and is an integer in the range [-100, 100].
• imaginary is the imaginary part and is an integer in the range [-100, 100].
• i2 == -1.

Given two complex numbers num1 and num2 as strings, return a string of the complex number that represents their multiplications.

Example 1:

Input: num1 = “1+1i”, num2 = “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: num1 = “1+-1i”, num2 = “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.

Constraints:

• num1 and num2 are valid complex numbers.

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
String	complexNumberMultiply(String num1, String num2)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

complexNumberMultiply

public String complexNumberMultiply(String num1,
                                    String num2)