import java.io.*;

class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        int N = Integer.parseInt(str);
        str = br.readLine();
        long[] a = new long[N];
        int cont = 0;
        for (String s:str.split(" ")){
            a[cont] = Integer.parseInt(s);
            cont++;
        }
        int ans = 0;
        for (long i:a){
            while (i%2==0){
                if (i%2==0){
                    i/=2;
                    ans++;
                }
            }
        }
        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