import java.util.Scanner;
import java.util.ArrayList;
import java.util.List;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        List<Integer> a = new ArrayList<>();
        for(int i = 0;i < n;i++){
            a.add(sc.nextInt());
        }
        List<Integer> cnt = new ArrayList<>();
        for(Integer it : a){
            int x = 0;
            while(it != 0){
                if(it % 2 != 0){
                    break;
                }
                x++;
                it /= 2;
            }
            cnt.add(x);
        }
        //System.out.println(cnt);
        int sum = 0;
        for(Integer it : cnt){
            sum += it;
        }
        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