import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        int ans = 0;
        for (int i = 0; i < n; i++) {
            int a = sc.nextInt();
            while (true) {
                if (a % 2 == 0) {
                    ans++;
                    a /= 2;
                } else {
                    break;
                }
            }
        }
        System.out.println(ans);

        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 n = sc.nextInt();

        int ans = 0;
        for (int i = 0; i < n; i++) {
            int a = sc.nextInt();
            while (true) {
                if (a % 2 == 0) {
                    ans++;
                    a /= 2;
                } else {
                    break;
                }
            }
        }
        System.out.println(ans);

        sc.close();
    }

} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        int ans = 0;
        for (int i = 0; i < n; i++) {
            int a = sc.nextInt();
            while (true) {
                if (a % 2 == 0) {
                    ans++;
                    a /= 2;
                } else {
                    break;
                }
            }
        }
        System.out.println(ans);

        sc.close();
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        int ans = 0;
        for (int i = 0; i < n; i++) {
            int a = sc.nextInt();
            while (true) {
                if (a % 2 == 0) {
                    ans++;
                    a /= 2;
                } else {
                    break;
                }
            }
        }
        System.out.println(ans);

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

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        int ans = 0;
        for (int i = 0; i < n; i++) {
            int a = sc.nextInt();
            while (true) {
                if (a % 2 == 0) {
                    ans++;
                    a /= 2;
                } else {
                    break;
                }
            }
        }
        System.out.println(ans);

        sc.close();
    }

} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        int ans = 0;
        for (int i = 0; i < n; i++) {
            int a = sc.nextInt();
            while (true) {
                if (a % 2 == 0) {
                    ans++;
                    a /= 2;
                } else {
                    break;
                }
            }
        }
        System.out.println(ans);

        sc.close();
    }

} 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 ans = 0;
        for (int i = 0; i < n; i++) {
            int a = sc.nextInt();
            while (true) {
                if (a % 2 == 0) {
                    ans++;
                    a /= 2;
                } else {
                    break;
                }
            }
        }
        System.out.println(ans);

        sc.close();
    }

}
