public static void Main()
int num = 1, count = 0, max = 0;
while (num < 10 || num > 99)
Console.WriteLine("Please enter a 2-digit number:");
num = int.Parse(Console.ReadLine());
if (num / 10 == 2 * (num % 10) || num % 10 == 2 * (num / 10))
Console.WriteLine(count + " numbers were found");
Console.WriteLine(max + " is max");