import java.util.Scanner;

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