import java.util.Scanner;

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 n = sc.nextInt();
			while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			}
		}
		System.out.println(count);
	}
} import java.util.Scanner; Scanner 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 n = sc.nextInt();
			while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			}
		}
		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 n = sc.nextInt();
			while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			}
		}
		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 n = sc.nextInt();
			while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			}
		}
		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 n = sc.nextInt();
			while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			}
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			int n = sc.nextInt();
			while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			}
		} {
			int n = sc.nextInt();
			while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			}
		} int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			} n % 2 == 0 n % 2 n 2 0 {
				n = (n >> 1);
				count++;
			} n = (n >> 1) n (n >> 1) n 1 count++ count 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 n = sc.nextInt();
			while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			}
		}
		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 n = sc.nextInt();
			while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			}
		}
		System.out.println(count);
	}
} Main
import java.util.Scanner;

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 n = sc.nextInt();
			while (n % 2 == 0) {
				n = (n >> 1);
				count++;
			}
		}
		System.out.println(count);
	}
}
