using System;

public class Program

{

    public static void Main()

    {

        int grade1, grade2, grade3, allgr;

            for (int i = 0;i<30; i++)

            {

                Console.WriteLine("enter your grade");

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

                Console.WriteLine("enter your grade");

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

                Console.WriteLine("enter your grade");

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

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

                if (allgr > 85)

                {

                    allgr = allgr + 5;

                }

                if (allgr > 100)

                {

                    allgr = 100;

                }

                Console.WriteLine(allgr);

​

            }

    }

}