import java.util.*;

public class Main {

  public static void main (String[] args) {

    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int count = 0;
    
    for (int i = 0; i < N; i++) {
      int a = sc.nextInt();
      int count_ = 0;
      while (a % 2 == 0) {
        a /= 2;
        count_++;
      }
      count += count_;
    }

    sc.close(); 

    System.out.println(count);
  
  }

} 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 count = 0;
    
    for (int i = 0; i < N; i++) {
      int a = sc.nextInt();
      int count_ = 0;
      while (a % 2 == 0) {
        a /= 2;
        count_++;
      }
      count += count_;
    }

    sc.close(); 

    System.out.println(count);
  
  }

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

    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int count = 0;
    
    for (int i = 0; i < N; i++) {
      int a = sc.nextInt();
      int count_ = 0;
      while (a % 2 == 0) {
        a /= 2;
        count_++;
      }
      count += count_;
    }

    sc.close(); 

    System.out.println(count);
  
  } main {

    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int count = 0;
    
    for (int i = 0; i < N; i++) {
      int a = sc.nextInt();
      int count_ = 0;
      while (a % 2 == 0) {
        a /= 2;
        count_++;
      }
      count += count_;
    }

    sc.close(); 

    System.out.println(count);
  
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int count = 0; count 0 for (int i = 0; i < N; i++) {
      int a = sc.nextInt();
      int count_ = 0;
      while (a % 2 == 0) {
        a /= 2;
        count_++;
      }
      count += count_;
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
      int a = sc.nextInt();
      int count_ = 0;
      while (a % 2 == 0) {
        a /= 2;
        count_++;
      }
      count += count_;
    } {
      int a = sc.nextInt();
      int count_ = 0;
      while (a % 2 == 0) {
        a /= 2;
        count_++;
      }
      count += count_;
    } int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int count_ = 0; count_ 0 while (a % 2 == 0) {
        a /= 2;
        count_++;
      } a % 2 == 0 a % 2 a 2 0 {
        a /= 2;
        count_++;
      } a /= 2 a 2 count_++ count_ count += count_ count count_ sc.close() sc.close sc 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) {

    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int count = 0;
    
    for (int i = 0; i < N; i++) {
      int a = sc.nextInt();
      int count_ = 0;
      while (a % 2 == 0) {
        a /= 2;
        count_++;
      }
      count += count_;
    }

    sc.close(); 

    System.out.println(count);
  
  }

} public class Main {

  public static void main (String[] args) {

    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int count = 0;
    
    for (int i = 0; i < N; i++) {
      int a = sc.nextInt();
      int count_ = 0;
      while (a % 2 == 0) {
        a /= 2;
        count_++;
      }
      count += count_;
    }

    sc.close(); 

    System.out.println(count);
  
  }

} Main
import java.util.*;

public class Main {

  public static void main (String[] args) {

    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int count = 0;
    
    for (int i = 0; i < N; i++) {
      int a = sc.nextInt();
      int count_ = 0;
      while (a % 2 == 0) {
        a /= 2;
        count_++;
      }
      count += count_;
    }

    sc.close(); 

    System.out.println(count);
  
  }

}