Balanced Brackets New

using System;
using System.Linq;

namespace Test
{
    class Program
    {

        public static void Main()
        {
            long n = long.Parse(Console.ReadLine());
            long openCount = 0;
            long closeCount = 0;

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

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