using System;

public class Program

{   

    public static int calcavg (int number)  

    {

        int grade1, grade2, grade3, average;

        grade1=int.Parse(Console.ReadLine());

        grade2=int.Parse(Console.ReadLine());

        grade3=int.Parse(Console.ReadLine());

        average=(grade1+grade2+grade3)/3;

        return average;

    }

    public static void Main()

    {

        for(int i=0;i<10;i++)

            Console.WriteLine(calcavg(i));

    }

}

​