import java.util.Scanner;

public class Main {

	public static void main(String args[]) {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();

		int[] a = new int[N];
		int sum_log2 = 0;
		for(int i=0;i<N;i++) {
			a[i] =sc.nextInt();
			sum_log2 += log2(a[i]);
		}

		System.out.println(sum_log2);
	}

	public static int log2(int a) {

		if(a % 2 != 0) {
			return 0;
		}else {
			return 1 + log2(a/2);
		}
	}

}

/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