27

using System;

namespace ConsoleApp3
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string userString = "(())((()()()))";
            int differenceOfElementsOfString = 0;
            int deepOfString = 0;

            for (int i = 0; i < userString.Length; i++)
            {
                if (userString[i] == '(')
                {
                    differenceOfElementsOfString++;
                }
                else
                {
                    differenceOfElementsOfString--;
                }

                if (differenceOfElementsOfString < 0)
                {
                    break;
                }
                else if (differenceOfElementsOfString > deepOfString)
                {
                    deepOfString = differenceOfElementsOfString;
                }
            }

            if (differenceOfElementsOfString == 0)
            {
                Console.WriteLine("Строка корректна с глубиной " + deepOfString);
            }
            else
            {
                Console.WriteLine("Строка не корректна.");
            }
        }
    }
}