import java.util.*;

class Main{
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);

		int max = scan.nextInt();
		int a; 
		int count = 0;
		for(int i = 0; i < max; i++){
			a = scan.nextInt();

			count += get2(a);
		}

		System.out.println(count);

	}

	private static int get2(int a){
		int count = 0;
		
		while(true){
			if(a % 2 != 0){
				return count;
			}

			a /= 2;
			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