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 ans = 0;
		for (int i=0; i<n; i++){
			int a = Integer.parseInt(sc.next());
			while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			}
		}
		System.out.println(ans);
	}
} 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 ans = 0;
		for (int i=0; i<n; i++){
			int a = Integer.parseInt(sc.next());
			while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			}
		}
		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());

		int ans = 0;
		for (int i=0; i<n; i++){
			int a = Integer.parseInt(sc.next());
			while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			}
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());

		int ans = 0;
		for (int i=0; i<n; i++){
			int a = Integer.parseInt(sc.next());
			while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			}
		}
		System.out.println(ans);
	} 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 ans = 0; ans 0 for (int i=0; i<n; i++){
			int a = Integer.parseInt(sc.next());
			while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			}
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			int a = Integer.parseInt(sc.next());
			while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			}
		} {
			int a = Integer.parseInt(sc.next());
			while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			}
		} int a = Integer.parseInt(sc.next()); a Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			} a%2 == 0 && a != 0 a%2 == 0 a%2 a 2 0 a != 0 a 0 {
				a /= 2;
				ans += 1;
			} a /= 2 a 2 ans += 1 ans 1 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 sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());

		int ans = 0;
		for (int i=0; i<n; i++){
			int a = Integer.parseInt(sc.next());
			while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			}
		}
		System.out.println(ans);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());

		int ans = 0;
		for (int i=0; i<n; i++){
			int a = Integer.parseInt(sc.next());
			while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			}
		}
		System.out.println(ans);
	}
} 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 ans = 0;
		for (int i=0; i<n; i++){
			int a = Integer.parseInt(sc.next());
			while (a%2 == 0 && a != 0){
				a /= 2;
				ans += 1;
			}
		}
		System.out.println(ans);
	}
}