import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

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

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

		int ans = 0;
		for (int i = 0; i < n; i++) {
			while (a[i] % 2 == 0) {
				a[i] /= 2;
				ans++;
			}
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

		int ans = 0;
		for (int i = 0; i < n; i++) {
			while (a[i] % 2 == 0) {
				a[i] /= 2;
				ans++;
			}
		}
		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int[] a = new int[n]; a new int[n] n for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			a[i] = sc.nextInt();
		} {
			a[i] = sc.nextInt();
		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc sc.close() sc.close sc int ans = 0; ans 0 for (int i = 0; i < n; i++) {
			while (a[i] % 2 == 0) {
				a[i] /= 2;
				ans++;
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			while (a[i] % 2 == 0) {
				a[i] /= 2;
				ans++;
			}
		} {
			while (a[i] % 2 == 0) {
				a[i] /= 2;
				ans++;
			}
		} while (a[i] % 2 == 0) {
				a[i] /= 2;
				ans++;
			} a[i] % 2 == 0 a[i] % 2 a[i] a i 2 0 {
				a[i] /= 2;
				ans++;
			} a[i] /= 2 a[i] a i 2 ans++ ans 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) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

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

		int ans = 0;
		for (int i = 0; i < n; i++) {
			while (a[i] % 2 == 0) {
				a[i] /= 2;
				ans++;
			}
		}
		System.out.println(ans);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

		int ans = 0;
		for (int i = 0; i < n; i++) {
			while (a[i] % 2 == 0) {
				a[i] /= 2;
				ans++;
			}
		}
		System.out.println(ans);
	}
}
