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