import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		try (Scanner sc = new Scanner(System.in)) {
			int n = sc.nextInt();
			Integer a[] = new Integer[n];
			for (int i = 0; i < n; i++) {
				a[i] = sc.nextInt();
			}

			int count = 0;
			for (int i = 0; i < n; i++) {
				while (a[i] % 2 == 0) {
					a[i] /= 2;
					count++;
				}
			}

			System.out.println(count);
		}

	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		try (Scanner sc = new Scanner(System.in)) {
			int n = sc.nextInt();
			Integer a[] = new Integer[n];
			for (int i = 0; i < n; i++) {
				a[i] = sc.nextInt();
			}

			int count = 0;
			for (int i = 0; i < n; i++) {
				while (a[i] % 2 == 0) {
					a[i] /= 2;
					count++;
				}
			}

			System.out.println(count);
		}

	}

} Main public static void main(String[] args) {

		try (Scanner sc = new Scanner(System.in)) {
			int n = sc.nextInt();
			Integer a[] = new Integer[n];
			for (int i = 0; i < n; i++) {
				a[i] = sc.nextInt();
			}

			int count = 0;
			for (int i = 0; i < n; i++) {
				while (a[i] % 2 == 0) {
					a[i] /= 2;
					count++;
				}
			}

			System.out.println(count);
		}

	} main {

		try (Scanner sc = new Scanner(System.in)) {
			int n = sc.nextInt();
			Integer a[] = new Integer[n];
			for (int i = 0; i < n; i++) {
				a[i] = sc.nextInt();
			}

			int count = 0;
			for (int i = 0; i < n; i++) {
				while (a[i] % 2 == 0) {
					a[i] /= 2;
					count++;
				}
			}

			System.out.println(count);
		}

	} try (Scanner sc = new Scanner(System.in)) {
			int n = sc.nextInt();
			Integer a[] = new Integer[n];
			for (int i = 0; i < n; i++) {
				a[i] = sc.nextInt();
			}

			int count = 0;
			for (int i = 0; i < n; i++) {
				while (a[i] % 2 == 0) {
					a[i] /= 2;
					count++;
				}
			}

			System.out.println(count);
		} {
			int n = sc.nextInt();
			Integer a[] = new Integer[n];
			for (int i = 0; i < n; i++) {
				a[i] = sc.nextInt();
			}

			int count = 0;
			for (int i = 0; i < n; i++) {
				while (a[i] % 2 == 0) {
					a[i] /= 2;
					count++;
				}
			}

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

		try (Scanner sc = new Scanner(System.in)) {
			int n = sc.nextInt();
			Integer a[] = new Integer[n];
			for (int i = 0; i < n; i++) {
				a[i] = sc.nextInt();
			}

			int count = 0;
			for (int i = 0; i < n; i++) {
				while (a[i] % 2 == 0) {
					a[i] /= 2;
					count++;
				}
			}

			System.out.println(count);
		}

	}

} public class Main {

	public static void main(String[] args) {

		try (Scanner sc = new Scanner(System.in)) {
			int n = sc.nextInt();
			Integer a[] = new Integer[n];
			for (int i = 0; i < n; i++) {
				a[i] = sc.nextInt();
			}

			int count = 0;
			for (int i = 0; i < n; i++) {
				while (a[i] % 2 == 0) {
					a[i] /= 2;
					count++;
				}
			}

			System.out.println(count);
		}

	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		try (Scanner sc = new Scanner(System.in)) {
			int n = sc.nextInt();
			Integer a[] = new Integer[n];
			for (int i = 0; i < n; i++) {
				a[i] = sc.nextInt();
			}

			int count = 0;
			for (int i = 0; i < n; i++) {
				while (a[i] % 2 == 0) {
					a[i] /= 2;
					count++;
				}
			}

			System.out.println(count);
		}

	}

}