using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MockUp_II_1.Game
{
    class Program
    {
        static void Main(string[] args)
        {
            var list = Console.ReadLine()
                .Split()
                .Select(int.Parse)
                .ToList();

            int firstExp = list[0] + list[1] + list[2];
            int secondExp = list[0] * list[1] * list[2];
            int thirdExp = list[0] + list[1] * list[2];
            int forthExp = list[0] * list[1] + list[2];

            if (firstExp >= secondExp && firstExp >= thirdExp && firstExp >= forthExp)
            {
                Console.WriteLine(firstExp);
            }

            else if (forthExp >= firstExp && forthExp >= secondExp && firstExp >= thirdExp)
            {
                Console.WriteLine(forthExp);
            }

            else if (secondExp >= firstExp && secondExp >= thirdExp && secondExp >= forthExp)
            {
                Console.WriteLine(secondExp);
            }

            else if (thirdExp >= firstExp && secondExp >= forthExp && thirdExp >= forthExp)
            {
                Console.WriteLine(thirdExp);
            }
        }
    }
}