using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}public int CheckNumber(int number, int[] arr)

        {

            int cont = 0;

​

            foreach (var item in arr)

            {

                if (item == number)

                {

                    cont++;

                }

            }

​

            return cont;

        }