import java.util.Scanner;

public class Main {

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

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

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

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

public class Main {

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