Balanced Brackets

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

namespace SolvingExpression
{
    class Program
    {
        static void Main(string[] args)
        {

            int n = int.Parse(Console.ReadLine());
            int openedBracket = 0;
            int closedBracket = 0;

            for (int i = 1; i <= n; i++)
            {
                string input = Console.ReadLine();

                    if (input == "(")
                    {
                        openedBracket++;
                        if (openedBracket - closedBracket > 1)
                        {
                            Console.WriteLine("UNBALANCED");
                            return;
                        }

                    }
                    else if (input == ")")
                    {
                        closedBracket++;
                        if (openedBracket - closedBracket != 0)
                        {
                            Console.WriteLine("UNBALANCED");
                            return;
                        }
                    }
            }
            if (openedBracket == closedBracket)
            {
                Console.WriteLine("BALANCED");
            }
            else
            {
                Console.WriteLine("UNBALANCED");
            }

        }
    }
}