// Given a string containing just the characters '(', ')', '{', '}', '[' and ']', 

// determine if the input string is valid. 

// The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]" are not.

​

using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}