• Home
• com.github.javadev
• leetcode-in-java
• 1.23
• source code
• readme.md

×

Project download

Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $

You can buy this project and download/modify it how often you want.

g0401_0500.s0415_add_strings.readme.md Maven / Gradle / Ivy

415\. Add Strings

Easy

Given two non-negative integers, `num1` and `num2` represented as string, return _the sum of_ `num1` _and_ `num2` _as a string_.

You must solve the problem without using any built-in library for handling large integers (such as `BigInteger`). You must also not convert the inputs to integers directly.

**Example 1:**

**Input:** num1 = "11", num2 = "123"

**Output:** "134" 

**Example 2:**

**Input:** num1 = "456", num2 = "77"

**Output:** "533" 

**Example 3:**

**Input:** num1 = "0", num2 = "0"

**Output:** "0" 

**Constraints:**

*   1 <= num1.length, num2.length <= 104
*   `num1` and `num2` consist of only digits.
*   `num1` and `num2` don't have any leading zeros except for the zero itself.