import java.util.Scanner;
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 x = 0;

		for(int i=0;i<a.length;i++) {

			while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			}
		}

		System.out.println(x);
	}
} import java.util.Scanner; Scanner java.util 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 x = 0;

		for(int i=0;i<a.length;i++) {

			while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			}
		}

		System.out.println(x);
	}
} 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 x = 0;

		for(int i=0;i<a.length;i++) {

			while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			}
		}

		System.out.println(x);
	} 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 x = 0;

		for(int i=0;i<a.length;i++) {

			while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			}
		}

		System.out.println(x);
	} 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 x = 0; x 0 for(int i=0;i<a.length;i++) {

			while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			}
		} int i=0; int i=0; i 0 i<a.length i a.length a a.length i++ i++ i {

			while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			}
		} {

			while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			}
		} while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			} a[i]%2==0 a[i]%2 a[i] a i 2 0 {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			} if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				} a[i] % 2 ==0 a[i] % 2 a[i] a i 2 0 {
					a[i] /= 2;
					x++;
				} a[i] /= 2 a[i] a i 2 x++ x System.out.println(x) System.out.println System.out System System.out x 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 x = 0;

		for(int i=0;i<a.length;i++) {

			while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			}
		}

		System.out.println(x);
	}
} 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 x = 0;

		for(int i=0;i<a.length;i++) {

			while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			}
		}

		System.out.println(x);
	}
} Main
import java.util.Scanner;
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 x = 0;

		for(int i=0;i<a.length;i++) {

			while(a[i]%2==0) {
				if(a[i] % 2 ==0) {
					a[i] /= 2;
					x++;
				}
			}
		}

		System.out.println(x);
	}
}
