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];
        int ans = 0;

        for(int i=0; i<N; i++){
            A[i] = sc.nextInt();
        }

        loop:for(int i=0; i<=30; i++){
            for(int j=0; j<N; j++){
                if(A[j]%2!=0){
                    System.out.println(ans);
                    break loop;
                }
                else if(A[j]%2==0){
                    A[j] = A[j] / 2;
                }
                if(j==N-1){
                    ans += 1;
                }
            }
        }
    } 
} 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];
        int ans = 0;

        for(int i=0; i<N; i++){
            A[i] = sc.nextInt();
        }

        loop:for(int i=0; i<=30; i++){
            for(int j=0; j<N; j++){
                if(A[j]%2!=0){
                    System.out.println(ans);
                    break loop;
                }
                else if(A[j]%2==0){
                    A[j] = A[j] / 2;
                }
                if(j==N-1){
                    ans += 1;
                }
            }
        }
    } 
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        int[] A = new int[N];
        int ans = 0;

        for(int i=0; i<N; i++){
            A[i] = sc.nextInt();
        }

        loop:for(int i=0; i<=30; i++){
            for(int j=0; j<N; j++){
                if(A[j]%2!=0){
                    System.out.println(ans);
                    break loop;
                }
                else if(A[j]%2==0){
                    A[j] = A[j] / 2;
                }
                if(j==N-1){
                    ans += 1;
                }
            }
        }
    } main {
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        int[] A = new int[N];
        int ans = 0;

        for(int i=0; i<N; i++){
            A[i] = sc.nextInt();
        }

        loop:for(int i=0; i<=30; i++){
            for(int j=0; j<N; j++){
                if(A[j]%2!=0){
                    System.out.println(ans);
                    break loop;
                }
                else if(A[j]%2==0){
                    A[j] = A[j] / 2;
                }
                if(j==N-1){
                    ans += 1;
                }
            }
        }
    } 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 int ans = 0; ans 0 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 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];
        int ans = 0;

        for(int i=0; i<N; i++){
            A[i] = sc.nextInt();
        }

        loop:for(int i=0; i<=30; i++){
            for(int j=0; j<N; j++){
                if(A[j]%2!=0){
                    System.out.println(ans);
                    break loop;
                }
                else if(A[j]%2==0){
                    A[j] = A[j] / 2;
                }
                if(j==N-1){
                    ans += 1;
                }
            }
        }
    } 
} public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        int[] A = new int[N];
        int ans = 0;

        for(int i=0; i<N; i++){
            A[i] = sc.nextInt();
        }

        loop:for(int i=0; i<=30; i++){
            for(int j=0; j<N; j++){
                if(A[j]%2!=0){
                    System.out.println(ans);
                    break loop;
                }
                else if(A[j]%2==0){
                    A[j] = A[j] / 2;
                }
                if(j==N-1){
                    ans += 1;
                }
            }
        }
    } 
} 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];
        int ans = 0;

        for(int i=0; i<N; i++){
            A[i] = sc.nextInt();
        }

        loop:for(int i=0; i<=30; i++){
            for(int j=0; j<N; j++){
                if(A[j]%2!=0){
                    System.out.println(ans);
                    break loop;
                }
                else if(A[j]%2==0){
                    A[j] = A[j] / 2;
                }
                if(j==N-1){
                    ans += 1;
                }
            }
        }
    } 
}