import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		new Main().run();
	}

	void run() {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int res = 0;
		for(int i=0; i<n; i++) {
			res += f(sc.nextLong());
		}
		sc.close();
		System.out.println(res);
	}
	
	int f(long a) {
		if(a%2 != 0) return 0;
		else return f(a/2) + 1;
	}
}
/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