Package g0401_0500.s0415_add_strings

Class Solution

  • public class Solution
extends Object
    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.

    • Constructor Detail

      • Solution

        public Solution()