239. Add Strings
EasyMath
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.
Examples
Input: 456 77
Output: 533
Explanation: 456 + 77 = 533 computed digit by digit.
Constraints
- 1 <= num1.length, num2.length <= 10^4
- num1 and num2 consist of only digits.
- num1 and num2 don't have any leading zeros except for the zero itself.
Loading...
Run checks all cases above. Submit evaluates all test cases.