using System;

​

public class Program

{

    public static void Main()

    {

        int Value;

        int count;

        string operation;

        count = 0;

        Console.WriteLine("enter integer from 0 to 99");

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

        Console.WriteLine("calculate A for (Additive) or M for (Multiplicative) persistance ");

        operation = Console.ReadLine();

        while (Value > 9)

        {

            if (operation == "a")

                Value = (Value / 10) + (Value % 10);

            else

                Value = (Value / 10) * (Value % 10);

            count = (count + 1);

        }

​

        Console.WriteLine("The persistance is: ");

        Console.WriteLine(count);

    }

}