import java.util.*;
 
public class Main{
  public static void main(String[]args){
    Scanner sc = new Scanner(System.in);
    int N = Integer.parseInt(sc.nextLine());
    String[] S = sc.nextLine().split(" ");
    int ans = 0;
    for(int i = 0; i < N; i++){
      int n = Integer.parseInt(S[i]);
      while(n % 2 == 0){
        n /= 2;
        ans++;
      }
    }
    System.out.println(ans);
  }
} import java.util.*; util.* java public class Main{
  public static void main(String[]args){
    Scanner sc = new Scanner(System.in);
    int N = Integer.parseInt(sc.nextLine());
    String[] S = sc.nextLine().split(" ");
    int ans = 0;
    for(int i = 0; i < N; i++){
      int n = Integer.parseInt(S[i]);
      while(n % 2 == 0){
        n /= 2;
        ans++;
      }
    }
    System.out.println(ans);
  }
} Main public static void main(String[]args){
    Scanner sc = new Scanner(System.in);
    int N = Integer.parseInt(sc.nextLine());
    String[] S = sc.nextLine().split(" ");
    int ans = 0;
    for(int i = 0; i < N; i++){
      int n = Integer.parseInt(S[i]);
      while(n % 2 == 0){
        n /= 2;
        ans++;
      }
    }
    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    int N = Integer.parseInt(sc.nextLine());
    String[] S = sc.nextLine().split(" ");
    int ans = 0;
    for(int i = 0; i < N; i++){
      int n = Integer.parseInt(S[i]);
      while(n % 2 == 0){
        n /= 2;
        ans++;
      }
    }
    System.out.println(ans);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = Integer.parseInt(sc.nextLine()); N Integer.parseInt(sc.nextLine()) Integer.parseInt Integer sc.nextLine() sc.nextLine sc String[] S = sc.nextLine().split(" "); S sc.nextLine().split(" ") sc.nextLine().split sc.nextLine() sc.nextLine sc " " int ans = 0; ans 0 for(int i = 0; i < N; i++){
      int n = Integer.parseInt(S[i]);
      while(n % 2 == 0){
        n /= 2;
        ans++;
      }
    } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
      int n = Integer.parseInt(S[i]);
      while(n % 2 == 0){
        n /= 2;
        ans++;
      }
    } {
      int n = Integer.parseInt(S[i]);
      while(n % 2 == 0){
        n /= 2;
        ans++;
      }
    } int n = Integer.parseInt(S[i]); n Integer.parseInt(S[i]) Integer.parseInt Integer S[i] S i while(n % 2 == 0){
        n /= 2;
        ans++;
      } n % 2 == 0 n % 2 n 2 0 {
        n /= 2;
        ans++;
      } n /= 2 n 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){
    Scanner sc = new Scanner(System.in);
    int N = Integer.parseInt(sc.nextLine());
    String[] S = sc.nextLine().split(" ");
    int ans = 0;
    for(int i = 0; i < N; i++){
      int n = Integer.parseInt(S[i]);
      while(n % 2 == 0){
        n /= 2;
        ans++;
      }
    }
    System.out.println(ans);
  }
} public class Main{
  public static void main(String[]args){
    Scanner sc = new Scanner(System.in);
    int N = Integer.parseInt(sc.nextLine());
    String[] S = sc.nextLine().split(" ");
    int ans = 0;
    for(int i = 0; i < N; i++){
      int n = Integer.parseInt(S[i]);
      while(n % 2 == 0){
        n /= 2;
        ans++;
      }
    }
    System.out.println(ans);
  }
} Main
import java.util.*;
 
public class Main{
  public static void main(String[]args){
    Scanner sc = new Scanner(System.in);
    int N = Integer.parseInt(sc.nextLine());
    String[] S = sc.nextLine().split(" ");
    int ans = 0;
    for(int i = 0; i < N; i++){
      int n = Integer.parseInt(S[i]);
      while(n % 2 == 0){
        n /= 2;
        ans++;
      }
    }
    System.out.println(ans);
  }
}