import java.util.*;

public class Main{
    public static void main(String[] argc){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int a;

        int ans = 0;

        for(int i=0;i<N;i++){
            a = sc.nextInt();

            while(a%2 == 0){
                a /= 2;
                ans++;
            }
        }


        System.out.println(ans);

    }
} import java.util.*; util.* java public class Main{
    public static void main(String[] argc){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int a;

        int ans = 0;

        for(int i=0;i<N;i++){
            a = sc.nextInt();

            while(a%2 == 0){
                a /= 2;
                ans++;
            }
        }


        System.out.println(ans);

    }
} Main public static void main(String[] argc){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int a;

        int ans = 0;

        for(int i=0;i<N;i++){
            a = sc.nextInt();

            while(a%2 == 0){
                a /= 2;
                ans++;
            }
        }


        System.out.println(ans);

    } main {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int a;

        int ans = 0;

        for(int i=0;i<N;i++){
            a = sc.nextInt();

            while(a%2 == 0){
                a /= 2;
                ans++;
            }
        }


        System.out.println(ans);

    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int a; a int ans = 0; ans 0 for(int i=0;i<N;i++){
            a = sc.nextInt();

            while(a%2 == 0){
                a /= 2;
                ans++;
            }
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            a = sc.nextInt();

            while(a%2 == 0){
                a /= 2;
                ans++;
            }
        } {
            a = sc.nextInt();

            while(a%2 == 0){
                a /= 2;
                ans++;
            }
        } a = sc.nextInt() a sc.nextInt() sc.nextInt sc while(a%2 == 0){
                a /= 2;
                ans++;
            } a%2 == 0 a%2 a 2 0 {
                a /= 2;
                ans++;
            } a /= 2 a 2 ans++ ans System.out.println(ans) System.out.println System.out System System.out ans String[] argc argc public class Main{
    public static void main(String[] argc){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int a;

        int ans = 0;

        for(int i=0;i<N;i++){
            a = sc.nextInt();

            while(a%2 == 0){
                a /= 2;
                ans++;
            }
        }


        System.out.println(ans);

    }
} public class Main{
    public static void main(String[] argc){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int a;

        int ans = 0;

        for(int i=0;i<N;i++){
            a = sc.nextInt();

            while(a%2 == 0){
                a /= 2;
                ans++;
            }
        }


        System.out.println(ans);

    }
} Main
import java.util.*;

public class Main{
    public static void main(String[] argc){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int a;

        int ans = 0;

        for(int i=0;i<N;i++){
            a = sc.nextInt();

            while(a%2 == 0){
                a /= 2;
                ans++;
            }
        }


        System.out.println(ans);

    }
}