
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[10000];

		for(int i=0; i<N; i++) {
			A[i]=sc.nextInt();
		}
		//System.out.println(N);
		int fn=0;
		for(int i=0; i<N; i++) {
			while(A[i]%2==0) {
				fn++;
				A[i]/=2;

			}
		}
		System.out.println(fn);
	}

}
/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