import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.nextLine());
		String[] strA = sc.nextLine().split(" ");
		int ans = 0;
		for(int i=0; i<N; i++) {
			ans += half(Integer.parseInt(strA[i]), 0);
		}
		System.out.println(ans);
		sc.close();
	}

	private static int half(int num, int count) {
		if(num % 2 == 0) {
			count++;
			count = half(num / 2, count);
		}
		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