/*

Write a method that takes in a string and checks for opening and closing brackets. Here are the requirements:

​

1. All opening brackets "[ ]" must have a closing bracket. There can be nested brackets as long as they are all closed at some point. 

    So valid cases would be:

        []

        [[]]

    Invalid would be:

        ][

        [[]

2. Ignore other characters

    For example these will be valid

        test[test34s][tests]

​

3. The string does not have to start with a open bracket but the first bracket must be an open bracket

    Valid:

        this []

    Invalid

        this ] [] [

​

Good luck!

*/

​

​

​

using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}