import java.util.*;

public class Main {
  public static void main(String[] args ) throws Exception {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    
    List<Integer> As = new ArrayList<>();
    
    int bit = 0;
    for (int i=0; i<N; i++) {
        bit = bit | sc.nextInt();
    }
    
    System.out.println(Integer.numberOfTrailingZeros(bit));
  }
}

/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