import java.util.*;

public class Main{
    public static void main(String[] argc){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int a;

        int ans = 0;

        for(int i=0;i<N;i++){
            a = sc.nextInt();

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


        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