using System;

public class Program

{

    public static void Main()

    {

        int c=0;

    for (int i =1;i<=10;i++)

    {

        Console.WriteLine("n={0}",i);

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

        if (n%2==0)

            c++;

    }

    if (c==10)

        Console.WriteLine("{0}",c);

    else

        Console.WriteLine("{0}",c);

    }

}