using System;

using System.Collections.Generic;

public class Program

{

    public static string inputbraces = "{}[]()";

    public static void Main()

    {

        bool isformatted = checkIfWellFormatted("( 2 + [3) - 1]");

        Console.WriteLine("Input value formatted:" +isformatted);

    }

    private static bool checkIfWellFormatted(string inputString)

    {

        if (string.IsNullOrEmpty(inputString))

            throw new ArgumentException("String is empty");

        Dictionary<char, int> _inputDictionary = new Dictionary<char, int>();

        foreach (char c in inputbraces)

        {

            _inputDictionary.Add(c, 0);

        }

        foreach (char c in inputString)

        {

            if (_inputDictionary.ContainsKey(c)) _inputDictionary[c] += 1;

        }

        return _inputDictionary['{'] == _inputDictionary['}']

            && _inputDictionary['('] == _inputDictionary[')']

            && _inputDictionary['['] == _inputDictionary[']'];

    }

}