import java.util.*;

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

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