import java.util.*;

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

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