import java.util.*;

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

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