import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    
    int[] integer = new int[n];
    
    for (int i = 0; i < integer.length; i++) 
      integer[i] = sc.nextInt();
    
   	int count = 0;
    loop : while (true) {
	    for (int i = 0; i < integer.length; i++) {
          if (integer[i] % 2 == 0)
	          integer[i] /= 2;
          else 
            break loop;
        }
      	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 = sc.nextInt();
    
    int[] integer = new int[n];
    
    for (int i = 0; i < integer.length; i++) 
      integer[i] = sc.nextInt();
    
   	int count = 0;
    loop : while (true) {
	    for (int i = 0; i < integer.length; i++) {
          if (integer[i] % 2 == 0)
	          integer[i] /= 2;
          else 
            break loop;
        }
      	count++;
    }
    
    System.out.println(count);
  }
} Main public static void main(String[] args) {
    
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    
    int[] integer = new int[n];
    
    for (int i = 0; i < integer.length; i++) 
      integer[i] = sc.nextInt();
    
   	int count = 0;
    loop : while (true) {
	    for (int i = 0; i < integer.length; i++) {
          if (integer[i] % 2 == 0)
	          integer[i] /= 2;
          else 
            break loop;
        }
      	count++;
    }
    
    System.out.println(count);
  } main {
    
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    
    int[] integer = new int[n];
    
    for (int i = 0; i < integer.length; i++) 
      integer[i] = sc.nextInt();
    
   	int count = 0;
    loop : while (true) {
	    for (int i = 0; i < integer.length; i++) {
          if (integer[i] % 2 == 0)
	          integer[i] /= 2;
          else 
            break loop;
        }
      	count++;
    }
    
    System.out.println(count);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int[] integer = new int[n]; integer new int[n] n for (int i = 0; i < integer.length; i++) 
      integer[i] = sc.nextInt(); int i = 0; int i = 0; i 0 i < integer.length i integer.length integer integer.length i++ i++ i integer[i] = sc.nextInt(); integer[i] = sc.nextInt() integer[i] integer i sc.nextInt() sc.nextInt sc int count = 0; count 0 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 = sc.nextInt();
    
    int[] integer = new int[n];
    
    for (int i = 0; i < integer.length; i++) 
      integer[i] = sc.nextInt();
    
   	int count = 0;
    loop : while (true) {
	    for (int i = 0; i < integer.length; i++) {
          if (integer[i] % 2 == 0)
	          integer[i] /= 2;
          else 
            break loop;
        }
      	count++;
    }
    
    System.out.println(count);
  }
} public class Main {
  public static void main(String[] args) {
    
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    
    int[] integer = new int[n];
    
    for (int i = 0; i < integer.length; i++) 
      integer[i] = sc.nextInt();
    
   	int count = 0;
    loop : while (true) {
	    for (int i = 0; i < integer.length; i++) {
          if (integer[i] % 2 == 0)
	          integer[i] /= 2;
          else 
            break loop;
        }
      	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 = sc.nextInt();
    
    int[] integer = new int[n];
    
    for (int i = 0; i < integer.length; i++) 
      integer[i] = sc.nextInt();
    
   	int count = 0;
    loop : while (true) {
	    for (int i = 0; i < integer.length; i++) {
          if (integer[i] % 2 == 0)
	          integer[i] /= 2;
          else 
            break loop;
        }
      	count++;
    }
    
    System.out.println(count);
  }
}
      