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

namespace Yuki
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            string[] s = Console.ReadLine().Split();

            int p = s.Where(x => x.Equals("+")).Count();
            int m = s.Where(x => x.Equals("-")).Count();

            int k = n - p - m;

            int[] a = new int[k];
            int b;
            int j = 0;



            for (int i = 0; i < n; i++)
            {
                if (int.TryParse(s[i], out b) || s[i] == "0")
                {
                    a[j] = b;
                    j++;
                }
            }

            Array.Sort(a);

            //max
            string st = "";

            for (int i = a.Length - 1; i > m + p - 1; i--)
            {
                st += a[i].ToString();
            }
            int max = int.Parse(st);
            for (int i = 0; i < p + m; i++)
            {
                if (i < m)
                {
                    max = max - a[i];
                }
                else
                {
                    max = max + a[i];
                }
            }

            Console.WriteLine(max);

            Console.WriteLine("-" + max.ToString());

            


        }
    }
}