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 y = 0;
    while (true) {
      int x = 0;
      for (int i = 0; i < n; i++) {
        if (a[i] % 2 == 0) {
          a[i] /= 2;
          x++;
        } else {
          break;
        }
      }
      if (x == n) {
        y++;
      } else {
        break;
      }
    }
    
    System.out.println(y);
 }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz