import java.util.Scanner;
public class Main {
	public static int div2(int a) {
		int div2 = 0;
		if(a != 0) {
			while(a % 2 == 0) {
				div2 += 1;
				a /= 2;
			}
		}
		return div2;
	}
	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++) {
			ans += div2(sc.nextInt());
		}
		System.out.println(ans);	

	}

} import java.util.Scanner; Scanner java.util public class Main {
	public static int div2(int a) {
		int div2 = 0;
		if(a != 0) {
			while(a % 2 == 0) {
				div2 += 1;
				a /= 2;
			}
		}
		return div2;
	}
	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++) {
			ans += div2(sc.nextInt());
		}
		System.out.println(ans);	

	}

} Main public static int div2(int a) {
		int div2 = 0;
		if(a != 0) {
			while(a % 2 == 0) {
				div2 += 1;
				a /= 2;
			}
		}
		return div2;
	} div2 {
		int div2 = 0;
		if(a != 0) {
			while(a % 2 == 0) {
				div2 += 1;
				a /= 2;
			}
		}
		return div2;
	} int div2 = 0; div2 0 if(a != 0) {
			while(a % 2 == 0) {
				div2 += 1;
				a /= 2;
			}
		} a != 0 a 0 {
			while(a % 2 == 0) {
				div2 += 1;
				a /= 2;
			}
		} while(a % 2 == 0) {
				div2 += 1;
				a /= 2;
			} a % 2 == 0 a % 2 a 2 0 {
				div2 += 1;
				a /= 2;
			} div2 += 1 div2 1 a /= 2 a 2 return div2; div2 int a a 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++) {
			ans += div2(sc.nextInt());
		}
		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++) {
			ans += div2(sc.nextInt());
		}
		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++) {
			ans += div2(sc.nextInt());
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			ans += div2(sc.nextInt());
		} {
			ans += div2(sc.nextInt());
		} ans += div2(sc.nextInt()) ans div2(sc.nextInt()) div2 sc.nextInt() sc.nextInt sc System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
	public static int div2(int a) {
		int div2 = 0;
		if(a != 0) {
			while(a % 2 == 0) {
				div2 += 1;
				a /= 2;
			}
		}
		return div2;
	}
	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++) {
			ans += div2(sc.nextInt());
		}
		System.out.println(ans);	

	}

} public class Main {
	public static int div2(int a) {
		int div2 = 0;
		if(a != 0) {
			while(a % 2 == 0) {
				div2 += 1;
				a /= 2;
			}
		}
		return div2;
	}
	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++) {
			ans += div2(sc.nextInt());
		}
		System.out.println(ans);	

	}

} Main
import java.util.Scanner;
public class Main {
	public static int div2(int a) {
		int div2 = 0;
		if(a != 0) {
			while(a % 2 == 0) {
				div2 += 1;
				a /= 2;
			}
		}
		return div2;
	}
	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++) {
			ans += div2(sc.nextInt());
		}
		System.out.println(ans);	

	}

}