import java.util.*;

public class Main {

    static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) {
        int N = sc.nextInt();

        int ans = 0;
        for (int i = 0; i < N; i++) {
            long a = sc.nextLong();
            if (a % 2 != 0) continue;

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