Package 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.<p>Medium</p> <p>A <a href="https://en.wikipedia.org/wiki/Complex_number" target="_top">complex number</a> can be represented as a string on the form <code>&quot;**real**+**imaginary**i&quot;</code> where:</p> <ul> <li><code>real</code> is the real part and is an integer in the range <code>[-100, 100]</code>.</li> <li><code>imaginary</code> is the imaginary part and is an integer in the range <code>[-100, 100]</code>.</li> <li><code>i² == -1</code>.</li> </ul> <p>Given two complex numbers <code>num1</code> and <code>num2</code> as strings, return <em>a string of the complex number that represents their multiplications</em>.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> num1 = &ldquo;1+1i&rdquo;, num2 = &ldquo;1+1i&rdquo;</p> <p><strong>Output:</strong> &ldquo;0+2i&rdquo;</p> <p><strong>Explanation:</strong> (1 + i) * (1 + i) = 1 + i2 + 2 * i = 2i, and you need convert it to the form of 0+2i.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> num1 = &ldquo;1+-1i&rdquo;, num2 = &ldquo;1+-1i&rdquo;</p> <p><strong>Output:</strong> &ldquo;0+-2i&rdquo;</p> <p><strong>Explanation:</strong> (1 - i) * (1 - i) = 1 + i2 - 2 * i = -2i, and you need convert it to the form of 0+-2i.</p> <p><strong>Constraints:</strong></p> <ul> <li><code>num1</code> and <code>num2</code> are valid complex numbers.</li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	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 Details

Solution

public Solution()

Method Details

complexNumberMultiply

public String complexNumberMultiply(String num1,
 String num2)