
import java.util.*;

public class Main {

    public static void main(String args[]) {
        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();
        }
        int ans = 0;
        for (int i = 0; i < n; i++) {
            while (a[i] != 0 && a[i] % 2 == 0) {
                a[i] /= 2;
                ans++;
            }
        }
        System.out.println(ans);
    }

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

    public static void main(String args[]) {
        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();
        }
        int ans = 0;
        for (int i = 0; i < n; i++) {
            while (a[i] != 0 && a[i] % 2 == 0) {
                a[i] /= 2;
                ans++;
            }
        }
        System.out.println(ans);
    }

} Main public static void main(String args[]) {
        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();
        }
        int ans = 0;
        for (int i = 0; i < n; i++) {
            while (a[i] != 0 && 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();
        }
        int ans = 0;
        for (int i = 0; i < n; i++) {
            while (a[i] != 0 && 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 int ans = 0; ans 0 for (int i = 0; i < n; i++) {
            while (a[i] != 0 && 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] != 0 && a[i] % 2 == 0) {
                a[i] /= 2;
                ans++;
            }
        } {
            while (a[i] != 0 && a[i] % 2 == 0) {
                a[i] /= 2;
                ans++;
            }
        } while (a[i] != 0 && a[i] % 2 == 0) {
                a[i] /= 2;
                ans++;
            } a[i] != 0 && a[i] % 2 == 0 a[i] != 0 a[i] a i 0 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[]) {
        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();
        }
        int ans = 0;
        for (int i = 0; i < n; i++) {
            while (a[i] != 0 && a[i] % 2 == 0) {
                a[i] /= 2;
                ans++;
            }
        }
        System.out.println(ans);
    }

} public class Main {

    public static void main(String args[]) {
        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();
        }
        int ans = 0;
        for (int i = 0; i < n; i++) {
            while (a[i] != 0 && a[i] % 2 == 0) {
                a[i] /= 2;
                ans++;
            }
        }
        System.out.println(ans);
    }

} Main

import java.util.*;

public class Main {

    public static void main(String args[]) {
        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();
        }
        int ans = 0;
        for (int i = 0; i < n; i++) {
            while (a[i] != 0 && a[i] % 2 == 0) {
                a[i] /= 2;
                ans++;
            }
        }
        System.out.println(ans);
    }

}
