import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String[] str = new String[210];
      
		int num = sc.nextInt();
      	for (int i = 0; i < num; i++) {
          str[i] = sc.next();
        }
		int count = 0;			// 操作を行った数
		boolean flag = true;	// 奇数があったらfalse

      	while (flag) {
			for (int i = 0; i < num; i++) {
				flag &= Integer.parseInt(str[i]) % 2 == 0;
			}
			if (!flag) {
				break;
			}
			count++;
			for (int i = 0; i < num; i++) {
				str[i] = String.valueOf(Integer.parseInt(str[i]) / 2);
			}
		}

		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