import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.nextLine());
        String[] in = sc.nextLine().split(" ");
        int num;
        int co = 0;
        for(int i =0 ; i<in.length ; i++){
            num = Integer.parseInt(in[i]);
            while(num % 2 == 0){
                co++;
                num/=2;
            }
        }
        System.out.println(co);
    }
}

/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