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