import java.util.*;
import java.util.stream.Collectors;


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 a=in.nextInt();
        	
        	for(;a%2==0;a/=2)
        		ans++;
        	
        }
        
        System.out.println(ans);


    }

} import java.util.*; util.* java import java.util.stream.Collectors; Collectors java.util.stream 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 a=in.nextInt();
        	
        	for(;a%2==0;a/=2)
        		ans++;
        	
        }
        
        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 a=in.nextInt();
        	
        	for(;a%2==0;a/=2)
        		ans++;
        	
        }
        
        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 a=in.nextInt();
        	
        	for(;a%2==0;a/=2)
        		ans++;
        	
        }
        
        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 a=in.nextInt();
        	
        	for(;a%2==0;a/=2)
        		ans++;
        	
        } int i=0; int i=0; i 0 i<N i N i++ i++ i {
        	int a=in.nextInt();
        	
        	for(;a%2==0;a/=2)
        		ans++;
        	
        } {
        	int a=in.nextInt();
        	
        	for(;a%2==0;a/=2)
        		ans++;
        	
        } int a=in.nextInt(); a in.nextInt() in.nextInt in for(;a%2==0;a/=2)
        		ans++; ; a%2==0 a%2 a 2 0 a/=2 a/=2 a 2 ans++; ans++ ans 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 a=in.nextInt();
        	
        	for(;a%2==0;a/=2)
        		ans++;
        	
        }
        
        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 a=in.nextInt();
        	
        	for(;a%2==0;a/=2)
        		ans++;
        	
        }
        
        System.out.println(ans);


    }

} Main
import java.util.*;
import java.util.stream.Collectors;


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 a=in.nextInt();
        	
        	for(;a%2==0;a/=2)
        		ans++;
        	
        }
        
        System.out.println(ans);


    }

}
