import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        int n = sc.nextInt();
        long[] num = new long[210];
        for(int i = 0; i < n; i++) num[i] = sc.nextLong();
        boolean odd = false;
        int ans = 0;
        lp: while(!odd) {
            for(int i = 0; i < n; i++) {
                if(num[i] % 2 == 1) {
                    odd = true;
                    break lp;
                }
                num[i] /= 2;
            }
            ans++;
        }
        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