Stacks and Queues - 08. Balanced Parenthesis

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

namespace Advanced
{
    class Program
    {
        static void Main(string[] args)
        {
            string brackets = Console.ReadLine();

            var stackOfBrackets = new Stack<char>();

            bool isValid = true;

            for (int i = 0; i < brackets.Length; i++)
            {
                char currentBracket = brackets[i];

                if (currentBracket == '(' || currentBracket == '[' || currentBracket == '{')
                {
                    stackOfBrackets.Push(currentBracket);
                }

                if (stackOfBrackets.Count == 0)
                {
                    isValid = false;
                    break;
                }

                if (stackOfBrackets.Count != 0)
                {
                    if (stackOfBrackets.Peek() == '(' && currentBracket == ')'
                        || stackOfBrackets.Peek() == '[' && currentBracket == ']'
                        || stackOfBrackets.Peek() == '{' && currentBracket == '}')
                    {
                        stackOfBrackets.Pop();
                    }

                }
            }

            if (isValid && stackOfBrackets.Count == 0)
            {
                Console.WriteLine("YES");
            }

            else
            {
                Console.WriteLine("NO");
            }
        }
    }
}