using System;
                    
public class Program
{
    public static void Main()
    {
        int ondanbuyukolan = 0;
int[] dizi = { 1, 5, 7, 12, 21, 18, 9, 8 };
for (int i = 0; i < dizi.Length; i++)
{
if (dizi[i]<10)
{
ondanbuyukolan++;
}
}
        Console.WriteLine(ondanbuyukolan);
    }
}