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++){
      long a = sc.nextLong();
      while(a % 2 == 0){
        a /= 2;
        count++;
      }
    }
    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++){
      long a = sc.nextLong();
      while(a % 2 == 0){
        a /= 2;
        count++;
      }
    }
    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++){
      long a = sc.nextLong();
      while(a % 2 == 0){
        a /= 2;
        count++;
      }
    }
    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++){
      long a = sc.nextLong();
      while(a % 2 == 0){
        a /= 2;
        count++;
      }
    }
    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++){
      long a = sc.nextLong();
      while(a % 2 == 0){
        a /= 2;
        count++;
      }
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      long a = sc.nextLong();
      while(a % 2 == 0){
        a /= 2;
        count++;
      }
    } {
      long a = sc.nextLong();
      while(a % 2 == 0){
        a /= 2;
        count++;
      }
    } long a = sc.nextLong(); a sc.nextLong() sc.nextLong sc while(a % 2 == 0){
        a /= 2;
        count++;
      } a % 2 == 0 a % 2 a 2 0 {
        a /= 2;
        count++;
      } a /= 2 a 2 count++ count 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++){
      long a = sc.nextLong();
      while(a % 2 == 0){
        a /= 2;
        count++;
      }
    }
    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++){
      long a = sc.nextLong();
      while(a % 2 == 0){
        a /= 2;
        count++;
      }
    }
    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++){
      long a = sc.nextLong();
      while(a % 2 == 0){
        a /= 2;
        count++;
      }
    }
    System.out.println(count);
  }
}