import java.util.Scanner;


public class Main {

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

		int t = scanner.nextInt();
		int result = 0;
		while(t-- > 0) {
			int n = scanner.nextInt();
			while((n & 1) == 0) {
				n = n >> 1;
				result++;
			}
		}
		System.out.println(result);
	}

}

/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