import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] A = new int[210];
		int N = Integer.parseInt(sc.next());
		for (int i = 0; i < N; i++) {
			A[i] = Integer.parseInt(sc.next());
		}
		int result = 0;
		boolean flg = false;
		while (true) {
			for (int i = 0; i < A.length; i++) {
				if (A[i] % 2 != 0) {
					flg = true;
					break;
				}
			}

			if (flg) {
				break;
			}

			for (int i = 0; i < A.length; i++) {
				A[i] /= 2;
			}

			result++;
		}
		System.out.println(result);
	}
}
/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