using System;

public class Program

{

    public static void Main()

    {

        var isMatch = isMatched("{XX$($$$)}");

        Console.WriteLine(isMatch);

    }

    public static bool isMatched(string str){

        int j = str.Length - 1;

        bool isMatch = false;

        for(int i = 0; i < j; i++){

            if(str[i] == '{' && str[j] == '}'){

                isMatch =  true;

            }

            else if(str[i] == '[' && str[j] == ']'){

                isMatch =  true;

            }

            else if(str[i] == '(' && str[j] == ')'){

                isMatch =  true;

            }

            else  if(str[i] == '{' || str[j] == '}' || str[i] == '[' && str[j] == ']' || str[i] == '(' || str[j] == ')'){       

                isMatch = false;

                break;

            }

            j--;

        }

        return isMatch;

    }

}

​

​

//Write a method implementing a generalization of the following constraints:

//input: {{[]]]} output: False

//input: [[{{}}]]  output: True

//input: {x{[@x4@}}}  output: False

//input: {{{[@%@]}}}  output: True