import java.util.Scanner;

class Main{

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int N = scan.nextInt();
		int[] data = new int[N];
		int sum= 0;
		for(int i =0;i < N;i++){
			data[i] = scan.nextInt();
		}
		for(int i=0;i<N;i++){
			while(data[i]%2 ==0){
				sum++;
				data[i] /= 2;
			}
		}

		System.out.println(sum);

	}





}
/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