import java.util.Scanner;

public class Expression {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int a = in.nextInt(), b = in.nextInt(), c = in.nextInt();

		int mul = a * b * c; // case 1
		int add = a + b + c; // case 2
		int addMul = (a + b) * c;
		int mulAdd = a + (b * c);
		int x = (a * b) + c;
		int y = a * (b + c);
		int max = Math.max(Math.max(Math.max(mul, add), Math.max(mulAdd, addMul)), Math.max(y, x));
		System.out.println(max);

		in.close();

	}

}