import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int[] ary = new int[n];
        for (int i = 0; i < n; i++) {
            ary[i] = Integer.parseInt(sc.next());
        }
        int ans = 0;
        a:while (true) {
            for (int i = 0; i < n; i++) {
                if (ary[i] % 2 != 0) {
                    break a;
                }
                ary[i] /= 2;
            }
            ans++;
        }
        System.out.println(ans);
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int[] ary = new int[n];
        for (int i = 0; i < n; i++) {
            ary[i] = Integer.parseInt(sc.next());
        }
        int ans = 0;
        a:while (true) {
            for (int i = 0; i < n; i++) {
                if (ary[i] % 2 != 0) {
                    break a;
                }
                ary[i] /= 2;
            }
            ans++;
        }
        System.out.println(ans);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int[] ary = new int[n];
        for (int i = 0; i < n; i++) {
            ary[i] = Integer.parseInt(sc.next());
        }
        int ans = 0;
        a:while (true) {
            for (int i = 0; i < n; i++) {
                if (ary[i] % 2 != 0) {
                    break a;
                }
                ary[i] /= 2;
            }
            ans++;
        }
        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int[] ary = new int[n];
        for (int i = 0; i < n; i++) {
            ary[i] = Integer.parseInt(sc.next());
        }
        int ans = 0;
        a:while (true) {
            for (int i = 0; i < n; i++) {
                if (ary[i] % 2 != 0) {
                    break a;
                }
                ary[i] /= 2;
            }
            ans++;
        }
        System.out.println(ans);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = Integer.parseInt(sc.next()); n Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int[] ary = new int[n]; ary new int[n] n for (int i = 0; i < n; i++) {
            ary[i] = Integer.parseInt(sc.next());
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            ary[i] = Integer.parseInt(sc.next());
        } {
            ary[i] = Integer.parseInt(sc.next());
        } ary[i] = Integer.parseInt(sc.next()) ary[i] ary i Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int ans = 0; ans 0 System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int[] ary = new int[n];
        for (int i = 0; i < n; i++) {
            ary[i] = Integer.parseInt(sc.next());
        }
        int ans = 0;
        a:while (true) {
            for (int i = 0; i < n; i++) {
                if (ary[i] % 2 != 0) {
                    break a;
                }
                ary[i] /= 2;
            }
            ans++;
        }
        System.out.println(ans);
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int[] ary = new int[n];
        for (int i = 0; i < n; i++) {
            ary[i] = Integer.parseInt(sc.next());
        }
        int ans = 0;
        a:while (true) {
            for (int i = 0; i < n; i++) {
                if (ary[i] % 2 != 0) {
                    break a;
                }
                ary[i] /= 2;
            }
            ans++;
        }
        System.out.println(ans);
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int[] ary = new int[n];
        for (int i = 0; i < n; i++) {
            ary[i] = Integer.parseInt(sc.next());
        }
        int ans = 0;
        a:while (true) {
            for (int i = 0; i < n; i++) {
                if (ary[i] % 2 != 0) {
                    break a;
                }
                ary[i] /= 2;
            }
            ans++;
        }
        System.out.println(ans);
    }
}
