import java.util.*;

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

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