game

using System;
using System.Collections.Generic;
using System.Linq;

namespace Game
{
    class Program
    {
        static void Main(string[] args)
        {

            string n = Console.ReadLine();

            List<int> number = n.ToString()
                .Select(x => Convert.ToInt32(x.ToString()))
                .ToList();

            int case1 = number[0] + number[1] + number[2];

            int case2 = number[0] * number[1] + number[2];

            int case3 = number[0] + number[1] * number[2];

            int case4 = number[0]*number[1]*number[2];

            //int case5 = number[0] * number[1] * number[2];



            int result = Math.Max(case1,(Math.Max(case2,(Math.Max(case3,case4)))));

            Console.WriteLine(result);

        }
    }
}