import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int count = 0;
        for(int i = 0; i < N; i++){
            int s = Integer.parseInt(sc.next());
            while(s % 2 == 0){
                s = s/2;
                count++;
            }
        }
       
        System.out.println(count);
    
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int count = 0;
        for(int i = 0; i < N; i++){
            int s = Integer.parseInt(sc.next());
            while(s % 2 == 0){
                s = s/2;
                count++;
            }
        }
       
        System.out.println(count);
    
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int count = 0;
        for(int i = 0; i < N; i++){
            int s = Integer.parseInt(sc.next());
            while(s % 2 == 0){
                s = s/2;
                count++;
            }
        }
       
        System.out.println(count);
    
    } main {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int count = 0;
        for(int i = 0; i < N; i++){
            int s = Integer.parseInt(sc.next());
            while(s % 2 == 0){
                s = s/2;
                count++;
            }
        }
       
        System.out.println(count);
    
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = Integer.parseInt(sc.next()); N Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int count = 0; count 0 for(int i = 0; i < N; i++){
            int s = Integer.parseInt(sc.next());
            while(s % 2 == 0){
                s = s/2;
                count++;
            }
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            int s = Integer.parseInt(sc.next());
            while(s % 2 == 0){
                s = s/2;
                count++;
            }
        } {
            int s = Integer.parseInt(sc.next());
            while(s % 2 == 0){
                s = s/2;
                count++;
            }
        } int s = Integer.parseInt(sc.next()); s Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc while(s % 2 == 0){
                s = s/2;
                count++;
            } s % 2 == 0 s % 2 s 2 0 {
                s = s/2;
                count++;
            } s = s/2 s s/2 s 2 count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int count = 0;
        for(int i = 0; i < N; i++){
            int s = Integer.parseInt(sc.next());
            while(s % 2 == 0){
                s = s/2;
                count++;
            }
        }
       
        System.out.println(count);
    
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int count = 0;
        for(int i = 0; i < N; i++){
            int s = Integer.parseInt(sc.next());
            while(s % 2 == 0){
                s = s/2;
                count++;
            }
        }
       
        System.out.println(count);
    
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        int count = 0;
        for(int i = 0; i < N; i++){
            int s = Integer.parseInt(sc.next());
            while(s % 2 == 0){
                s = s/2;
                count++;
            }
        }
       
        System.out.println(count);
    
    }
}