import java.util.*;
 
public class Main{
  public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);
    int N=sc.nextInt(), count=0, a;
    
    for(int i=0; i<N; i++) {
      a = sc.nextInt();
      while(a % 2 == 0) {
        count++;
        a /= 2;
      }
    }
 
    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