Problem: Add Strings
Statement
Given two non-negative integers, num1 and num2, represented as strings, return the sum of num1 and num2 as a string.
You must not use any built-in library for handling large integers (such as BigInteger) or directly convert the inputs to integers.
Constraints:
num1.length,num2.lengthnum1andnum2consist of only digits.num1andnum2don’t have any leading zeros except for the zero itself.
Examples
Understand the problem
Figure it out!
Try it yourself
Problem: Add Strings
Statement
Given two non-negative integers, num1 and num2, represented as strings, return the sum of num1 and num2 as a string.
You must not use any built-in library for handling large integers (such as BigInteger) or directly convert the inputs to integers.
Constraints:
num1.length,num2.lengthnum1andnum2consist of only digits.num1andnum2don’t have any leading zeros except for the zero itself.