import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int ans = 0;
        for(int i = 0;i < n;i++){
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        }

        System.out.println(ans);

    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int ans = 0;
        for(int i = 0;i < n;i++){
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        }

        System.out.println(ans);

    }
} Main public static void main(String[] args) throws Exception {
        // Your code here!

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int ans = 0;
        for(int i = 0;i < n;i++){
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        }

        System.out.println(ans);

    } main {
        // Your code here!

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int ans = 0;
        for(int i = 0;i < n;i++){
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        }

        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 ans = 0; ans 0 for(int i = 0;i < n;i++){
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        } {
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        } int temp = sc.nextInt(); temp sc.nextInt() sc.nextInt sc while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            } temp % 2 == 0 temp % 2 temp 2 0 {
                ans ++;
                temp = temp / 2;
            } ans ++ ans temp = temp / 2 temp temp / 2 temp 2 System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int ans = 0;
        for(int i = 0;i < n;i++){
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        }

        System.out.println(ans);

    }
} public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int ans = 0;
        for(int i = 0;i < n;i++){
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        }

        System.out.println(ans);

    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int ans = 0;
        for(int i = 0;i < n;i++){
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        }

        System.out.println(ans);

    }
}