import java.util.*;

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