using System;

public class Program

{

    public static void Main()

    {

        int [] arr=new int[]{3,4,5,6,7,8,9,10,11};

        int num,sum=0;

        Console.WriteLine("enter the number");

        num = int.Parse(Console.ReadLine());

           for (int i = 0;i<arr.Length;i++)

           {

              if(arr[i]<num)

              {

                  Console.Write(arr[i]+ "+");

                 sum+=arr[i]; 

              }

           }  

        Console.WriteLine("="+sum);

    }

}