import 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 < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			}
		}
		System.out.println(count);
		
		sc.close();
	}
} 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[] a = new int[n];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			}
		}
		System.out.println(count);
		
		sc.close();
	}
} 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 < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			}
		}
		System.out.println(count);
		
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			}
		}
		System.out.println(count);
		
		sc.close();
	} 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 < a.length; i++) {
			a[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length 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 count = 0; count 0 for (int i = 0; i < a.length; i++) {
			if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			}
		} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
			if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			}
		} {
			if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			}
		} if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			} a[i] %2 != 0 a[i] %2 a[i] a i 2 0 {
				continue;
			} continue; {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			} while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				} true {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				} if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					} a[i]%2==0 a[i]%2 a[i] a i 2 0 {
						count++;
						a[i] /= 2;
					} count++ count a[i] /= 2 a[i] a i 2 {
						break;
					} break; System.out.println(count) System.out.println System.out System System.out count sc.close() sc.close sc 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 < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			}
		}
		System.out.println(count);
		
		sc.close();
	}
} 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 < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			}
		}
		System.out.println(count);
		
		sc.close();
	}
} Main
import 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 < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int count = 0;
		for (int i = 0; i < a.length; i++) {
			if (a[i] %2 != 0) {
				continue;
			} else {
				while (true) {
					if (a[i]%2==0) {
						count++;
						a[i] /= 2;
					} else {
						break;
					}
				}
			}
		}
		System.out.println(count);
		
		sc.close();
	}
}
