import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        
        int N=sc.nextInt();
        int[] a=new int[N];
        
        int ans=0;
        
        
        for(int i=0;i<N;i++){
            a[i]=sc.nextInt();
            
        }
        for(int i = 0; i<N; i++) {
			while(a[i]%2 != 1) {
				ans++;
				a[i] /= 2;
			}
		}
        
        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