import java.util.*;

public class Main {

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

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

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

public class Main {

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);		
		int n = sc.nextInt();
		int count = 0;
		for (int i = 0; i < n; i++) {
			int x = sc.nextInt();
			while (x > 0 && x % 2 == 0) {
				count++;
				x /= 2;
			}
		}
		System.out.println(count);
	}
}
