using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        // Student collection marks

        var marks = new int [] {2, 4, 5, 3,3, 4, 2 ,5, 5};  

        // Print count of each mark value

        Console.WriteLine("Hello World");           

    }

}

​

​

​