import java.util.Scanner;

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

      for(int i=0;i<n;i++) {
    	  a=sc.nextInt();
    	  for( m=0;a%2==0;m++) {
    		  a=a/2;


    	  }
    	  ans=ans+m;
      }
      System.out.println(ans);

  }
}

/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