import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] arr = new int[3];
        arr[0] = sc.nextInt();
        arr[1] = sc.nextInt();
        arr[2] = sc.nextInt();
        Arrays.sort(arr);
        int ans = Math.max(arr[2] * (arr[1] + arr[0]), arr[2] * arr[1] * arr[0]);
        System.out.println(ans);
    }
}