import java.util.Scanner;

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

        int N = sc.nextInt();
        int[] ary = new int[N];

        for (int i = 0; i < N; i++) {
            ary[i] = sc.nextInt();
        }

        int answer = 0;

        for (int i = 0; i < N; i++) {
            while (true) {
                if (ary[i] % 2 == 0) {
                    ary[i] /= 2;
                    answer += 1;
                }
                else {
                    break;
                }
            }
        }

        System.out.println(answer);
    }
}

/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