import java.util.*;
import java.io.InputStreamReader;
import java.io.BufferedReader;


public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        String[] s = br.readLine().split(" ");
        int[] a = new int[n];
        
        for (int i = 0; i < n; i++) {
            a[i] = Integer.parseInt(s[i]);
        }
        
        int count = 0;
        for (int i = 0; i < n; i++) {
            while (a[i]%2 == 0) {
                a[i] /= 2;
                count++;
            }
        }
        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