import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
      	int number[] = new int[n];
      	boolean a = true;
      	int count = 0;
      
      	for (int i=0; i<n; i++) {
          number[i]=sc.nextInt();
        }
      	sc.close();
      
        while (a==true) {
          for (int i=0; i<n; i++) {
            if (number[i]%2!=0) {
              a = false;
            }
          }
          if (a == false) {
            break;
          }
          for (int i=0; i<n; i++) {
            number[i]/=2;
          }
          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