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 count = 0;

    while (a[n-1] > 0) {
      for (int i = 0; i < n; i++) {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      }
      count++;
    }

  }

} 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 count = 0;

    while (a[n-1] > 0) {
      for (int i = 0; i < n; i++) {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      }
      count++;
    }

  }

} 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 count = 0;

    while (a[n-1] > 0) {
      for (int i = 0; i < n; i++) {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      }
      count++;
    }

  } 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 count = 0;

    while (a[n-1] > 0) {
      for (int i = 0; i < n; i++) {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      }
      count++;
    }

  } 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 count = 0; count 0 while (a[n-1] > 0) {
      for (int i = 0; i < n; i++) {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      }
      count++;
    } a[n-1] > 0 a[n-1] a n-1 n 1 0 {
      for (int i = 0; i < n; i++) {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      }
      count++;
    } for (int i = 0; i < n; i++) {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      } {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      } if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        } a[i]%2 == 0 a[i]%2 a[i] a i 2 0 {
          a[i] /= 2;
        } a[i] /= 2 a[i] a i 2 {
          System.out.println(count);
          return;
        } System.out.println(count) System.out.println System.out System System.out count return; count++ count 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 count = 0;

    while (a[n-1] > 0) {
      for (int i = 0; i < n; i++) {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      }
      count++;
    }

  }

} 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 count = 0;

    while (a[n-1] > 0) {
      for (int i = 0; i < n; i++) {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      }
      count++;
    }

  }

} 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 count = 0;

    while (a[n-1] > 0) {
      for (int i = 0; i < n; i++) {
        if (a[i]%2 == 0) {
          a[i] /= 2;
        } else {
          System.out.println(count);
          return;
        }
      }
      count++;
    }

  }

}
