
import java.util.Scanner;

public class Main {

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

		int N = scanner.nextInt();

		int[] ai = new int[N];

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

		int cnt = 0;
		for (int i : ai) {
			while(i%2 != 1) {
				cnt ++;
				i = i/2;
			}
		}

		System.out.println(cnt);

	}

}

/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