import java.util.*;

class Main
{
	public static void main(String[] args)
	{
		Scanner sc = new Scanner(System.in);
		int n;
		n=sc.nextInt();
		int ans=Integer.numberOfTrailingZeros(sc.nextInt());
		for(int i=1;i<n;i++)
		{
			ans=Math.min(ans,Integer.numberOfTrailingZeros(sc.nextInt()));
		}
		System.out.println(ans);
	}
}
/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