using System;

public class Program

{

    private static int SoLuongUocSoChan(int n)

    {

        int Dem = 0;

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

        {

            if(n%i==0 && i%2==0)

            {

                Dem++;

            }

        }

        return Dem;

    }

    public static void Main()

    {

            Console.WriteLine("Nhap N: ");

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

            int D = SoLuongUocSoChan(n);

            Console.WriteLine("So luong uoc so chan cua {n} la: " + D);

    }

}