import java.util.*;
import java.lang.*;

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

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