import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author mikit
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        C3Or2 solver = new C3Or2();
        solver.solve(1, in, out);
        out.close();
    }

    static class C3Or2 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int r = 0;
            for (int i = 0; i < n; i++) {
                int a = in.nextInt();
                int s = a & -a;
                r += log2(s);
            }
            out.println(r);
        }

        static int log2(int n) {
            if (n == 0) {
                return 0;
            }

            int pos = 0;
            if (n >= (1 << 16)) {
                n >>= 16;
                pos += 16;
            }
            if (n >= (1 << 8)) {
                n >>= 8;
                pos += 8;
            }
            if (n >= (1 << 4)) {
                n >>= 4;
                pos += 4;
            }
            if (n >= (1 << 2)) {
                n >>= 2;
                pos += 2;
            }
            if (n >= (1 << 1)) {
                pos += 1;
            }
            return pos;
        }

    }
}


/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