import java.util.Scanner;

public class Main {
  public static void main(String args[]) {
    
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    int A[] = new int[n];
    int rc = 0;
    boolean execFlg = true;
    
    for (int i=0;i<n;i++) {
      A[i] = sc.nextInt();
    }
    
    while (execFlg) {      
      for (int j=0;j<n;j++) {
        if (A[j]%2 == 0) {
          A[j] = A[j]/2;
        } else {
          execFlg = false;
          break;
        }
      }
      
      if (execFlg) {
        rc = rc + 1;
      }
    }
    
    System.out.println(rc);
  }
}
/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