import java.util.Scanner;

public class Main {
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int n = Integer.parseInt(sc.next());
		int count = 0;
		
		for(int i = 0; i < n; i++) {
			long l = Long.parseLong(sc.next());
			while(l % 2 == 0) {
				l /= 2;
				count++;
			}
		}
		
		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 n = Integer.parseInt(sc.next());
		int count = 0;
		
		for(int i = 0; i < n; i++) {
			long l = Long.parseLong(sc.next());
			while(l % 2 == 0) {
				l /= 2;
				count++;
			}
		}
		
		System.out.println(count);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int n = Integer.parseInt(sc.next());
		int count = 0;
		
		for(int i = 0; i < n; i++) {
			long l = Long.parseLong(sc.next());
			while(l % 2 == 0) {
				l /= 2;
				count++;
			}
		}
		
		System.out.println(count);
	} main {
		Scanner sc = new Scanner(System.in);
		
		int n = Integer.parseInt(sc.next());
		int count = 0;
		
		for(int i = 0; i < n; i++) {
			long l = Long.parseLong(sc.next());
			while(l % 2 == 0) {
				l /= 2;
				count++;
			}
		}
		
		System.out.println(count);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = Integer.parseInt(sc.next()); n Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int count = 0; count 0 for(int i = 0; i < n; i++) {
			long l = Long.parseLong(sc.next());
			while(l % 2 == 0) {
				l /= 2;
				count++;
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			long l = Long.parseLong(sc.next());
			while(l % 2 == 0) {
				l /= 2;
				count++;
			}
		} {
			long l = Long.parseLong(sc.next());
			while(l % 2 == 0) {
				l /= 2;
				count++;
			}
		} long l = Long.parseLong(sc.next()); l Long.parseLong(sc.next()) Long.parseLong Long sc.next() sc.next sc while(l % 2 == 0) {
				l /= 2;
				count++;
			} l % 2 == 0 l % 2 l 2 0 {
				l /= 2;
				count++;
			} l /= 2 l 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 = Integer.parseInt(sc.next());
		int count = 0;
		
		for(int i = 0; i < n; i++) {
			long l = Long.parseLong(sc.next());
			while(l % 2 == 0) {
				l /= 2;
				count++;
			}
		}
		
		System.out.println(count);
	}
} public class Main {
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int n = Integer.parseInt(sc.next());
		int count = 0;
		
		for(int i = 0; i < n; i++) {
			long l = Long.parseLong(sc.next());
			while(l % 2 == 0) {
				l /= 2;
				count++;
			}
		}
		
		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 n = Integer.parseInt(sc.next());
		int count = 0;
		
		for(int i = 0; i < n; i++) {
			long l = Long.parseLong(sc.next());
			while(l % 2 == 0) {
				l /= 2;
				count++;
			}
		}
		
		System.out.println(count);
	}
}