import java.util.*;

class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int cou = 0;

    for(int i=0;i<n;i++){
      a[i] = sc.nextInt();
    }


    for(int i=0;i<n;i++){
      while(a[i]%2==0){
        cou += 1;
        a[i] = a[i]/2;
      }
    }


    System.out.println(cou);

  }
} import java.util.*; util.* java class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int cou = 0;

    for(int i=0;i<n;i++){
      a[i] = sc.nextInt();
    }


    for(int i=0;i<n;i++){
      while(a[i]%2==0){
        cou += 1;
        a[i] = a[i]/2;
      }
    }


    System.out.println(cou);

  }
} Main public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int cou = 0;

    for(int i=0;i<n;i++){
      a[i] = sc.nextInt();
    }


    for(int i=0;i<n;i++){
      while(a[i]%2==0){
        cou += 1;
        a[i] = a[i]/2;
      }
    }


    System.out.println(cou);

  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int cou = 0;

    for(int i=0;i<n;i++){
      a[i] = sc.nextInt();
    }


    for(int i=0;i<n;i++){
      while(a[i]%2==0){
        cou += 1;
        a[i] = a[i]/2;
      }
    }


    System.out.println(cou);

  } 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 cou = 0; cou 0 for(int i=0;i<n;i++){
      a[i] = sc.nextInt();
    } int i=0; int i=0; i 0 i<n i n i++ i++ i {
      a[i] = sc.nextInt();
    } {
      a[i] = sc.nextInt();
    } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc for(int i=0;i<n;i++){
      while(a[i]%2==0){
        cou += 1;
        a[i] = a[i]/2;
      }
    } int i=0; int i=0; i 0 i<n i n i++ i++ i {
      while(a[i]%2==0){
        cou += 1;
        a[i] = a[i]/2;
      }
    } {
      while(a[i]%2==0){
        cou += 1;
        a[i] = a[i]/2;
      }
    } while(a[i]%2==0){
        cou += 1;
        a[i] = a[i]/2;
      } a[i]%2==0 a[i]%2 a[i] a i 2 0 {
        cou += 1;
        a[i] = a[i]/2;
      } cou += 1 cou 1 a[i] = a[i]/2 a[i] a i a[i]/2 a[i] a i 2 System.out.println(cou) System.out.println System.out System System.out cou String args[] args
import java.util.*;

class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int cou = 0;

    for(int i=0;i<n;i++){
      a[i] = sc.nextInt();
    }


    for(int i=0;i<n;i++){
      while(a[i]%2==0){
        cou += 1;
        a[i] = a[i]/2;
      }
    }


    System.out.println(cou);

  }
}
