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