package com.company;
import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int a = input.nextInt();
        int num1 = a%10;
        int num2 = a/10 %10;
        int num3 = a/100 %10;

        if (num1>1 && num2>1 && num3>1){
            System.out.println(num1*num2*num3);
        }
        else if (num1<2 && num2>1 && num3>1){
            System.out.println(num1+num2*num3);
        }
        else if (num1>1 && num2<2 && num3>1){
            System.out.println(num1*num3+num2);
        }
        else if (num1>1 && num2>1 && num3<2){
            System.out.println(num1*num2+num3);
        }
        else {
            System.out.println(num1+num2+num3);
        }

    }
}