import java.util.*;

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

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