import java.util.*;
 
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = Integer.parseInt(sc.next());
        long[] a = new long[N];
        int count = 0;
        for(int i=0; i<N; i++) {
            a[i] = Long.parseLong(sc.next());
            count += count2(a[i]);
        }
        System.out.println(count);
    }
    static int count2(long a) {
        int count = 0;
        if(a % 2 != 0) {
            return count;
        }else {
            while(true) {
                a /= 2;
                count++;
                if(a % 2 != 0) {
                    return count;
                }
            }
        }
    }
}

/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