import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        List<Long> list = new ArrayList<>();
        for(int i = 0; i < N; i++)
            list.add(new Long(in.nextLong()));

        long ans = 0;
        for(long v : list){
            while(v % 2 == 0){
                ans++;
                v /= 2;
            }
        }
        System.out.println(ans);
    }
} import java.util.ArrayList; ArrayList java.util import java.util.List; List java.util import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        List<Long> list = new ArrayList<>();
        for(int i = 0; i < N; i++)
            list.add(new Long(in.nextLong()));

        long ans = 0;
        for(long v : list){
            while(v % 2 == 0){
                ans++;
                v /= 2;
            }
        }
        System.out.println(ans);
    }
} Main public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        List<Long> list = new ArrayList<>();
        for(int i = 0; i < N; i++)
            list.add(new Long(in.nextLong()));

        long ans = 0;
        for(long v : list){
            while(v % 2 == 0){
                ans++;
                v /= 2;
            }
        }
        System.out.println(ans);
    } main {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        List<Long> list = new ArrayList<>();
        for(int i = 0; i < N; i++)
            list.add(new Long(in.nextLong()));

        long ans = 0;
        for(long v : list){
            while(v % 2 == 0){
                ans++;
                v /= 2;
            }
        }
        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 List<Long> list = new ArrayList<>(); list new ArrayList<>() for(int i = 0; i < N; i++)
            list.add(new Long(in.nextLong())); int i = 0; int i = 0; i 0 i < N i N i++ i++ i list.add(new Long(in.nextLong())); list.add(new Long(in.nextLong())) list.add list new Long(in.nextLong()) long ans = 0; ans 0 for(long v : list){
            while(v % 2 == 0){
                ans++;
                v /= 2;
            }
        } long v list {
            while(v % 2 == 0){
                ans++;
                v /= 2;
            }
        } {
            while(v % 2 == 0){
                ans++;
                v /= 2;
            }
        } while(v % 2 == 0){
                ans++;
                v /= 2;
            } v % 2 == 0 v % 2 v 2 0 {
                ans++;
                v /= 2;
            } ans++ ans v /= 2 v 2 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();
        List<Long> list = new ArrayList<>();
        for(int i = 0; i < N; i++)
            list.add(new Long(in.nextLong()));

        long ans = 0;
        for(long v : list){
            while(v % 2 == 0){
                ans++;
                v /= 2;
            }
        }
        System.out.println(ans);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        List<Long> list = new ArrayList<>();
        for(int i = 0; i < N; i++)
            list.add(new Long(in.nextLong()));

        long ans = 0;
        for(long v : list){
            while(v % 2 == 0){
                ans++;
                v /= 2;
            }
        }
        System.out.println(ans);
    }
} Main
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt();
        List<Long> list = new ArrayList<>();
        for(int i = 0; i < N; i++)
            list.add(new Long(in.nextLong()));

        long ans = 0;
        for(long v : list){
            while(v % 2 == 0){
                ans++;
                v /= 2;
            }
        }
        System.out.println(ans);
    }
}