import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!

        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int ans = 0;
        for(int i = 0;i < n;i++){
            int temp = sc.nextInt();
            while(temp % 2 == 0){
                ans ++;
                temp = temp / 2;
            }
        }

        System.out.println(ans);

    }
}
/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