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