Package g0401_0500.s0415_add_strings

Class Solution

java.lang.Object

g0401_0500.s0415_add_strings.Solution

public class Solution
extends Object

415 - Add Strings.<p>Easy</p> <p>Given two non-negative integers, <code>num1</code> and <code>num2</code> represented as string, return <em>the sum of</em> <code>num1</code> <em>and</em> <code>num2</code> <em>as a string</em>.</p> <p>You must solve the problem without using any built-in library for handling large integers (such as <code>BigInteger</code>). You must also not convert the inputs to integers directly.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> num1 = &ldquo;11&rdquo;, num2 = &ldquo;123&rdquo;</p> <p><strong>Output:</strong> &ldquo;134&rdquo;</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> num1 = &ldquo;456&rdquo;, num2 = &ldquo;77&rdquo;</p> <p><strong>Output:</strong> &ldquo;533&rdquo;</p> <p><strong>Example 3:</strong></p> <p><strong>Input:</strong> num1 = &ldquo;0&rdquo;, num2 = &ldquo;0&rdquo;</p> <p><strong>Output:</strong> &ldquo;0&rdquo;</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= num1.length, num2.length <= 10⁴</code></li> <li><code>num1</code> and <code>num2</code> consist of only digits.</li> <li><code>num1</code> and <code>num2</code> don&rsquo;t have any leading zeros except for the zero itself.</li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
String	addStrings(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

addStrings

public String addStrings(String num1,
 String num2)