import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int ans=Integer.MAX_VALUE;
        int tmp;
        int count;
        int n=sc.nextInt();
        for(int i=0;i<n;i++){
            tmp=sc.nextInt();
            count=0;
            while(tmp%2==0){
                tmp/=2;
                count++;
            }
            ans=Math.min(ans,count);
        }
        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