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 < N; i++){
      a[i] += sc.nextInt();
    }
    int ans = 0;
    ending:while (true){
      for (int i = 0; i < N; i++){
        if (a[i]%2 == 1) break ending;
        a[i] /= 2;
      }
      ans++;
    }
    System.out.println(ans);
  }
} 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 < N; i++){
      a[i] += sc.nextInt();
    }
    int ans = 0;
    ending:while (true){
      for (int i = 0; i < N; i++){
        if (a[i]%2 == 1) break ending;
        a[i] /= 2;
      }
      ans++;
    }
    System.out.println(ans);
  }
} 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 ans = 0;
    ending:while (true){
      for (int i = 0; i < N; i++){
        if (a[i]%2 == 1) break ending;
        a[i] /= 2;
      }
      ans++;
    }
    System.out.println(ans);
  } 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 ans = 0;
    ending:while (true){
      for (int i = 0; i < N; i++){
        if (a[i]%2 == 1) break ending;
        a[i] /= 2;
      }
      ans++;
    }
    System.out.println(ans);
  } 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 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 = sc.nextInt();
    int[] a = new int[N];
    for (int i = 0; i < N; i++){
      a[i] += sc.nextInt();
    }
    int ans = 0;
    ending:while (true){
      for (int i = 0; i < N; i++){
        if (a[i]%2 == 1) break ending;
        a[i] /= 2;
      }
      ans++;
    }
    System.out.println(ans);
  }
} 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 ans = 0;
    ending:while (true){
      for (int i = 0; i < N; i++){
        if (a[i]%2 == 1) break ending;
        a[i] /= 2;
      }
      ans++;
    }
    System.out.println(ans);
  }
} 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 < N; i++){
      a[i] += sc.nextInt();
    }
    int ans = 0;
    ending:while (true){
      for (int i = 0; i < N; i++){
        if (a[i]%2 == 1) break ending;
        a[i] /= 2;
      }
      ans++;
    }
    System.out.println(ans);
  }
}
