import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] input = new int[N];
		for(int i = 0;i<N;i++) {
			input[i]=sc.nextInt();
		}
		int res=Integer.MAX_VALUE;
		for(int i = 0;i<N;i++) {
			int count=0;
			while(input[i]%2==0) {
				input[i]/=2;
				count++;
			}
			if(count<res) {
				res=count;
			}
		}
		System.out.println(res);


	}
}
/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