import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner input = new Scanner(System.in);

        while(input.hasNext()){
            int N = input.nextInt();
            int count2 = 0;

            while(N > 0){
                 int a = input.nextInt();

                 while(a % 2 == 0){
                       ++count2;
                       a /= 2;
                 }

                 --N;
            }

            System.out.println(count2);
       }
    }
}
/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