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