AreTheBracketsCorrect

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

namespace _03AreBracketsCorrect
{
    class AreBracketsCorrect
    {
        static int CountElements(string s, char ch)
        {
            int count = 0;
            foreach (char item in s)
            {
                if (item == ch)
                {
                    count++;
                }
            }
            return count;
        }
        static int SumOfIndexes(string s, char ch)
        {
            int count = 0;
            for (int i = 0; i < s.Length; i++)
            {
                if (s[i] == ch)
                {
                    count += i;
                }
            }
            return count;
        }
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            int rightBracketsCount = CountElements(input, ')');
            int leftBracketsCount = CountElements(input, '(');

            int leftBracketsIndexes = SumOfIndexes(input,'(');
            int rightBracketsIndexes = SumOfIndexes(input,')');
            if ((leftBracketsCount == rightBracketsCount) && (leftBracketsIndexes < rightBracketsIndexes))
            {
                Console.WriteLine("The brackets in entered expression \"{0}\" are correct!", input);
            }
            else
            {
                Console.WriteLine("The brackets in expression \"{0}\" are NOT correct!",input);
            }
        }
    }
}