Game

using System;
using System.Collections.Generic;

namespace Task_1
{
    class Program
    {
        static void Main(string[] args)
        {
            int number = int.Parse(Console.ReadLine());
            var numbers = new List<int>();
            int sum = 0;
            int product = 1;
            int result = 0;
            while (number != 0)
            {
                int currDigit = number % 10;
                numbers.Add(currDigit);
                number /= 10;
            }

            int firstDigit = numbers[0];
            int secondDigit = numbers[1];
            int thirdDigit = numbers[2];
            sum = firstDigit + secondDigit + thirdDigit;
            product = firstDigit * secondDigit * thirdDigit;
            if (firstDigit == 1 || secondDigit == 1 || thirdDigit == 1)
            {
                product += 1;
            }

            result = Math.Max(product, sum);
            Console.WriteLine(result);
        }
    }
}