import java.util.Scanner;

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

    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        int ans = 0;
        for(int i=0;i<N;i++){
            int cur = in.nextInt();
            while(cur%2==0){
                ans++;
                cur = cur/2;
            }
        }
        System.out.println(ans);

    }
} Main public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        int ans = 0;
        for(int i=0;i<N;i++){
            int cur = in.nextInt();
            while(cur%2==0){
                ans++;
                cur = cur/2;
            }
        }
        System.out.println(ans);

    } main {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        int ans = 0;
        for(int i=0;i<N;i++){
            int cur = in.nextInt();
            while(cur%2==0){
                ans++;
                cur = cur/2;
            }
        }
        System.out.println(ans);

    } Scanner in = new Scanner(System.in); in new Scanner(System.in) int N = in.nextInt(); N in.nextInt() in.nextInt in int ans = 0; ans 0 for(int i=0;i<N;i++){
            int cur = in.nextInt();
            while(cur%2==0){
                ans++;
                cur = cur/2;
            }
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
            int cur = in.nextInt();
            while(cur%2==0){
                ans++;
                cur = cur/2;
            }
        } {
            int cur = in.nextInt();
            while(cur%2==0){
                ans++;
                cur = cur/2;
            }
        } int cur = in.nextInt(); cur in.nextInt() in.nextInt in while(cur%2==0){
                ans++;
                cur = cur/2;
            } cur%2==0 cur%2 cur 2 0 {
                ans++;
                cur = cur/2;
            } ans++ ans cur = cur/2 cur cur/2 cur 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) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        int ans = 0;
        for(int i=0;i<N;i++){
            int cur = in.nextInt();
            while(cur%2==0){
                ans++;
                cur = cur/2;
            }
        }
        System.out.println(ans);

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

    }
} Main
import java.util.Scanner;

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

    }
}