import java.util.*;

class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int counter = sc.nextInt();
    
    int answer = 0;
    for(int i = 0;i<counter;i++){
      answer += check(sc.nextInt());
    }
    System.out.println(answer);
  }
  
  public static int check(long number){
    int ans = 0;
    while(number%2 == 0) {
      ans++;
      number = number/2;
    }
    return 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