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