import java.util.*;

public class Main{
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int[] ans = new int[N];
    for (int i=0; i<N; i++) {
      ans[i] = sc.nextInt();
    }
    int count =0;
    int end =0;
    while (true) {
      for (int i=0; i<N; i++) {
        if (ans[i] % 2 == 0) {
          ans[i] /= 2;
        } else {
          end++;
          break;
        }
      }
      if (end != 0) break;
      count++;
    }
    System.out.println(count);
  }
}
/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