두 수의 합 - C#

using System;
using System.Numerics;

public class Solution {
    public string solution(string a, string b) {
        int maxLength = Math.Max(a.Length, b.Length);
        int carry = 0;
        string result = "";

        for (int i = 0; i < maxLength; i++) {
            int digitA = (i < a.Length) ? a[a.Length - 1 - i] - '0' : 0;
            int digitB = (i < b.Length) ? b[b.Length - 1 - i] - '0' : 0;
            
            int sum = digitA + digitB + carry;
            carry = sum / 10;
            int digitSum = sum % 10;

            result = digitSum + result;
        }

        if (carry > 0) {
            result = carry + result;
        }

        return result;
    }
}

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• 프로그래머스: https://school.programmers.co.kr/learn/courses/30/lessons/181846?language=csharp

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