import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int N =sc.nextInt();
		int[] n =new int[N];
		for(int i=0;i<N;i++) {
			n[i]=sc.nextInt();
		}
		
		int m =0;
		int i=0;
		while(i<N) {
			
			if(n[i]%2==0) {
				n[i]=n[i]/2;
				m++;
			}else {
				i++;
			}
		}
		
		
		System.out.println(m);
	}
}
/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