import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int N=sc.nextInt();
		int[] a=new int[N];
		for(int i=0; i<N; i++) {
			a[i]=sc.nextInt();
		}

		int cnt=0;

		boolean waru2=true;
		for(int i=0; i<N; i++) {
			waru2=true;
			while(waru2==true) {
				if((a[i]/2)*2==a[i]) {
					a[i]/=2;
					cnt++;
					//そのまま
				}
				else if((a[i]/2)*2!=a[i]) {
					waru2=false;
				}
			}
		}
		System.out.println(cnt);
	}
}
/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