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);

  }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz