04. Character Multiplier

using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
using System.Numerics;

namespace _04_Exc_CharacterMultiplier
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> input = Console.ReadLine().Split().ToList();
            List<char> str1 = input[0].ToList();
            List<char> str2 = input[1].ToList();
            int sum = 0;

            if (str1.Count < str2.Count)
            {
                int count = str2.Count - str1.Count;
                for (int i = 0; i < count; i++)
                {
                    str1.Add((char)1);
                }
            }
            if (str1.Count > str2.Count)
            {
                var count = str1.Count - str2.Count;
                for (int i = 0; i < count ; i++)
                {
                    str2.Add((char)1);
                }
            }

            for (int i = 0; i < str2.Count; i++)
            {
                var variable = str1[i];
                sum += str1[i] * str2[i];
            }

            Console.WriteLine(sum);
        }
    }
}